Impact of Swine Reproductive Technologies on Pig and Global Food Production

Chapter

Abstract

Reproductive technologies have dramatically changed the way pigs are raised for pork production in developed and developing countries. This has involved such areas as pigs produced/sow, more consistent pig flow to market, pig growth rate and feed efficiency, carcass yield and quality, labor efficiency, and pig health. Some reproductive technologies are in widespread use for commercial pork operations [Riesenbeck, Reprod Domest Anim 46:1–3, 2011] while others are in limited use in specific segments of the industry [Knox, Reprod Domest Anim 46:4–6, 2011]. Significant changes in the efficiency of pork production have occurred as a direct result of the use of reproductive technologies that were intended to improve the transfer of genes important for food production [Gerrits et al., Theriogenology 63:283–299, 2005]. While some technologies focused on the efficiency of gene transfer, others addressed fertility and labor issues. Among livestock species, pig reproductive efficiency appears to have achieved exceptionally high rates of performance (PigCHAMP 2011) [Benchmark 2011, Ames, IA, 12–16]. From the maternal side, this includes pigs born per litter, farrowing rate, as well as litters per sow per year. On the male side, boar fertility, sperm production, and sows served per sire have improved as well [Knox et al., Theriogenology, 70:1202–1208, 2008]. These shifts in the efficiency of swine fertility have resulted in the modern pig as one of the most efficient livestock species for global food production. These reproductive changes have predominantly occurred in developed countries, but data suggests transfer and adoption of these in developing countries as well (FAO STAT 2009; FAS 2006) [World pig meat production: food and agriculture organization of the United Nations, 2009; FAS, 2006) Worldwide Pork Production, 2006]. Technological advancements in swine reproduction have had profound effects on industry structure, production, efficiency, quality, and profitability. In all cases, the adoption of these technologies has aided in the creation of a sustainable supply of safe and affordable pork for consumers around the world [den Hartog, Adv Pork Prod 15:17–24, 2004].

Keywords

Pork production Reproductive efficiency Livestock Swine Farrowing 

References

  1. AASV (2003) Boar stud guidelines: health, hygiene, and sanitation guidelines for boar studs providing semen to the domestic market. J Swine Health Prod 11:204–206Google Scholar
  2. Allan GM, Ellis JA (2000) Porcine circoviruses: a review. J Vet Diagn Invest 12(1):3–14PubMedGoogle Scholar
  3. Almeida FR, Novak S, Foxcroft GR (2000) The time of ovulation in relation to estrus duration in gilts. Theriogenology 53(7):1389–1396PubMedGoogle Scholar
  4. Althouse GC (2012) How have third-party quality assurance programs been applied to boar studs? In: Safranski T (ed) Midwest boar stud manager’s conference IV, St. Louis, MOGoogle Scholar
  5. Althouse GC, Lu KG (2005) Bacteriospermia in extended porcine semen. Theriogenology 63(2):573–584PubMedGoogle Scholar
  6. Althouse GC, Rossow K (2011) The potential risk of infectious disease dissemination via artificial insemination in swine. Reprod Domest Anim 46:64–67PubMedGoogle Scholar
  7. Althouse GC, Kuster CE, Clark SG, Weisiger RM (2000) Field investigations of bacterial contaminants and their effects on extended porcine semen. Theriogenology 53(5):1167–1176PubMedGoogle Scholar
  8. Aneas SB, Gary BG, Bouvier BP (2008) Collectis® automated boar collection technology. Theriogenology 70(8):1368–1373PubMedGoogle Scholar
  9. Barb CR, Hausman GJ, Kraeling RR (2010) Luteinizing hormone secretion as influenced by age and estradiol in the prepubertal gilt. Anim Reprod Sci 122(3–4):324–327PubMedGoogle Scholar
  10. Bartlett A, Pain SJ, Hughes PE, Stott P, van Wettere WHEJ (2009) The effects of PG600 and boar exposure on oestrus detection and potential litter size following mating at either the induced (pubertal) or second oestrus. Anim Reprod Sci 114(1–3):219–227PubMedGoogle Scholar
  11. Bates RO, Day BN, Britt JH, Clark LK, Brauer MA (1991) Reproductive performance of sows treated with a combination of pregnant mare’s serum gonadotropin and human chorionic gonadotropin at weaning in the summer. J Anim Sci 69(3):894–898PubMedGoogle Scholar
  12. Bates RO, Kelpinski J, Hines B, Ricker D (2000) Hormonal therapy for sows weaned during fall and winter. J Anim Sci 78(8):2068–2071PubMedGoogle Scholar
  13. Bathgate R, Eriksson BM, Thomson PC, Maxwell WM, Evans G (2008) Field fertility of frozen-thawed boar sperm at low doses using non-surgical, deep uterine insemination. Anim Reprod Sci 103(3–4):323–335PubMedGoogle Scholar
  14. Belstra BA, Flowers WL, See MT (2004) Factors affecting temporal relationships between estrus and ovulation in commercial sow farms. Anim Reprod Sci 84(3–4):377PubMedGoogle Scholar
  15. Beltranena E, Patterson JL, Foxcroft GR (2005) Designing effective boar stimulation systems as a critical feature of the gilt development unit. In: Allen D. Leman swine conference pre-conference workshop, College of Veterinary Medicine, University of Minnesota, St. Paul, MNGoogle Scholar
  16. Bennett-Steward K, Aramini J, Pelland C, Friendship R (2008) Equine chorionic gonadotrophin and porcine luteinizing hormone to shorten and synchronize the wean-to-breed interval among parity-one and parity-two sows. J Swine Health Prod 16:182–187Google Scholar
  17. Berkvens P, Feitsma H, Eggert J (2012) Low concentration, high fertility; every day Dutch AI practice. In: Safranski T (ed) Miwest boar stud manager’s conference IV, St. Louis, MOGoogle Scholar
  18. Bolet G, Bidanel JP, Ollivier L (2001) Selection for litter size in pigs. II. Efficiency of closed and open selection lines. Genet Sel Evol 33(5):515–528PubMedGoogle Scholar
  19. Bracken CJ, Safranski TJ, Cantley TC, Lucy MC, Lamberson WR (2003) Effect of time of ovulation and sperm concentration on fertilization rate in gilts. Theriogenology 60(4):669–676PubMedGoogle Scholar
  20. Breen SM, Knox RV (2012) The impact of dose of FSH (folltropin) containing LH (lutropin) on follicular development, estrus and ovulation responses in prepubertal gilts. Anim Reprod Sci 132(3–4):193–200PubMedGoogle Scholar
  21. Breen SM, Farris KL, Rodriguez-Zas SL, Knox RV (2005) Effect of age and physical or fence-line boar exposure on estrus and ovulation response in prepubertal gilts administered PG600. J Anim Sci 83:460–465PubMedGoogle Scholar
  22. Britt JH (1986) Improving sow productivity through management during gestation, lactation and after weaning. J Anim Sci 63(4):1288–1296PubMedGoogle Scholar
  23. Britt JH, Day BN, Webel SK, Brauer MA (1989) Induction of a fertile estrus in prepuberal gilts by treatment with a combination of pregnant mare’s serum gonadotropin and human chorionic gonadotropin. J Anim Sci 67:1148–1153PubMedGoogle Scholar
  24. Brussow KP, Jochle W, Huhn U (1996) Control of ovulation with a GnRH analog in gilts and sows. Theriogenology 46(6):925PubMedGoogle Scholar
  25. Brussow KP, Schneider F, Kanitz W, Ratky J, Kauffold J, Wahner M (2009) Studies on fixed-time ovulation induction in the pig. Soc Reprod Fertil Suppl 66:187–195PubMedGoogle Scholar
  26. Burke P (2000) Productivity assessment of liquid boar semen usage. In: Johnson LA, Guthrie HD (eds) Boar semen preservation IV. Allen Press, Lawrence, KS, p 149Google Scholar
  27. Caton JS, Jesse GW, Day BN, Ellersieck MR (1986) The effect of duration of boar exposure on the frequency of gilts reaching first estrus. J Anim Sci 62:1210–1214PubMedGoogle Scholar
  28. Clutter A (2009) Genetic selection for lifetime reproductive performance. Soc Reprod Fertil Suppl 66:293–302PubMedGoogle Scholar
  29. Degenstein KL, O’Donoghue R, Patterson JL, Beltranena E, Ambrose DJ, Foxcroft GR, Dyck MK (2008) Synchronization of ovulation in cyclic gilts with porcine luteinizing hormone (pLH) and its effects on reproductive function. Theriogenology 70(7):1075–1085PubMedGoogle Scholar
  30. den Hartog L (2004) Developments in global pig production. Adv Pork Prod 15:17–24Google Scholar
  31. Dial GD, Marsh WE, Polson DD, Vaillancourt JP (1992) Reproductive failure: differential diagnosis. In: Leman AD et al (eds) Diseases of swine, 7th edn. Iowa State University Press, Ames, IA, pp 88–137Google Scholar
  32. Didion BA (2008) Computer-assisted semen analysis and its utility for profiling boar semen samples. Theriogenology 70(8):1374–1376PubMedGoogle Scholar
  33. Didion BA, Braun G, Duggan M (2012) Field fertility of frozen boar semen: a retrospective report comprising over 2700 AI services spanning a four year period. In: Safranski T (ed) Midwest boar stud manager’s conference IV, St. Louis, MOGoogle Scholar
  34. Dyck MK, Foxcroft GR, Novak S, Ruiz-Sanchez A, Patterson J, Dixon WT (2011) Biological markers of boar fertility. Reprod Domest Anim 46:55–58PubMedGoogle Scholar
  35. Ehlers MJ, Mabry JW, Bertrand JK, Stalder KJ (2005) Variance components and heritabilities for sow productivity traits estimated from purebred versus crossbred sows. J Anim Breed Genet 122(5):318–324PubMedGoogle Scholar
  36. Engblom L, Lundeheim N, Strandberg E, Schneider P, Dalin AM, Andersson K (2008) Factors affecting length of productive life in Swedish commercial sows. J Anim Sci 86(2):432–441PubMedGoogle Scholar
  37. Eriksson BM, Petersson H, Rodriguez-Martinez H (2002) Field fertility with exported boar semen frozen in the new flatpack container. Theriogenology 58:1065–1079PubMedGoogle Scholar
  38. Estienne MJ, Harper AF, Horsley BR, Estienne CE, Knight JW (2001) Effects of P.G. 600 on the onset of estrus and ovulation rate in gilts treated with regu-mate. J Anim Sci 79(11):2757–2761PubMedGoogle Scholar
  39. FAOSTAT (2009) World pig meat production: food and agriculture organization of the United Nations. http://faostat.fao.org/site/569/DesktopDefault.aspx?PageID=569. Accessed 28 March 2013
  40. FAS (2006) Worldwide pork production. USDA Foreign Agricultural Service. http://www.fas.usda.gov/
  41. Faust MA, Tess MW, Robison OW (1992) A bioeconomic simulation model for a hierarchical swine breeding structure. J Anim Sci 70(6):1760–1774PubMedGoogle Scholar
  42. Feitsma H, Broekhuijse M, Gadella BM (2011) Do CASA systems satisfy consumers demands? A critical analysis. Reprod Domest Anim 46:49–51PubMedGoogle Scholar
  43. Fernandez L, Diez C, Ordonez J, Carbajo M (2005) Reproductive performance in primiparous sows after postweaning treatment with a progestagen. J Swine Health Prod 13:28–30Google Scholar
  44. Flowers WL (1996) Performance expectations of different mating systems. Proc Allen D Leman Swine Conf 25:63–66Google Scholar
  45. Flowers WL (1997) Management of boars for efficient semen production. J Reprod Fertil Suppl 52:67–78PubMedGoogle Scholar
  46. Flowers WL (1998) Insemination programs for swine to increase fertility. J Anim Sci 76(Suppl 3):39–46Google Scholar
  47. Flowers WL (2000) Influence of adjusting timing and frequency of mating on the anticipated duration of estrus on reproductive performance of sows. Department of Animal Sciences Report No. 248. http://www.ncsu.edu/project/swine_extension/swinereports/2000/flowers2.htm. Accessed 26 Jan 2012
  48. Flowers WL (2002) Increasing fertilization rate of boars: influence of number and quality of spermatozoa inseminated. J Anim Sci 80(Suppl 1):E47–E53Google Scholar
  49. Flowers WL (2008) Genetic and phenotypic variation in reproductive traits of AI boars. Theriogenology 70(8):1297–1303PubMedGoogle Scholar
  50. Flowers WL, Alhusen HD (1992) Reproductive performance and estimates of labor requirements associated with combinations of artificial insemination and natural service in swine. J Anim Sci 70(3):615–621PubMedGoogle Scholar
  51. Flowers WL, Esbenshade KL (1993) Optimizing management of natural and artificial matings in swine. J Reprod Fertil 48:217–228Google Scholar
  52. Flowers W, Knox R (2001) Pregnancy diagnosis in swine. Pork industry handbook. N.C. Cooperative Extension Service, Raleigh, NCGoogle Scholar
  53. Foxcroft GR (2001) Gilt management for the new millennium-research to reality. In: Manitoba swine seminar, ManitobaGoogle Scholar
  54. Foxcroft GR, Almeida F, Patterson JL, Willis HJ. (2001) Age and weight at puberty in relation to lifetime performance. In: Proceedings of the 6th international conference on pig reproduction, ColumbiaGoogle Scholar
  55. Foxcroft GR, Dyck MK, Ruiz-Sanchez A, Novak S, Dixon WT (2008) Identifying useable semen. Theriogenology 70(8):1324–1336PubMedGoogle Scholar
  56. Gaggini TS, Perin J, Arend LS, Bernardi ML, Wentz I, Bortolozzo FP (2013) Altrenogest treatment associated with a farrowing induction protocol to avoid early parturition in sows. Reprod Domest Anim 48:390–395PubMedGoogle Scholar
  57. Gerrits RJ, Lunney JK, Johnson LA, Pursel VG, Kraeling RR, Rohrer GA, Dobrinsky JR (2005) Perspectives for artificial insemination and genomics to improve global swine populations. Theriogenology 63(2):283–299PubMedGoogle Scholar
  58. Gerritsen R, Langendijk P, Soede NM, Kemp B (2005) Effects of (artificial) boar stimuli on uterine activity in estrous sows. Theriogenology 64(7):1518–1525PubMedGoogle Scholar
  59. Guerin B, Pozzi N (2005) Viruses in boar semen: detection and clinical as well as epidemiological consequences regarding disease transmission by artificial insemination. Theriogenology 63(2):556–572PubMedGoogle Scholar
  60. Guthrie HD (1985) Control of time of parturition in pigs. J Reprod Fertil Suppl 33:229–244PubMedGoogle Scholar
  61. Harmon J, Levis D, Zulovich J, Hoff S, Bodman G (2001) Swine breeding and gestation facilities handbook. MidWest plan service, vol 43. Iowa State University, Ames, IAGoogle Scholar
  62. Harris DL (2000) Multi-site pig production. Iowa State University Press, Ames, IAGoogle Scholar
  63. Harris DL, Lofgren DL, Stewart TS, Schinckel AP (1989) Adapting best linear unbiased prediction (BLUP) for timely genetic evaluation: I. Progeny traits in a single contemporary group for each sex. J Anim Sci 67(12):3209–3222PubMedGoogle Scholar
  64. Hofmo PO, Grevle IS (2000) Development and commercial use of frozen use of frozen boar semen in Norway. In: Johnson LA, Guthrie HD (eds) Boar semen preservation IV. Allen Press, Lawrence, KS, pp 71–86Google Scholar
  65. Horsley BR, Estienne MJ, Harper AF, Purcell SH, Baitis HK, Beal WE, Knight JW (2005) Effect of P.G. 600 on the timing of ovulation in gilts treated with altrenogest. J Anim Sci 83(7):1690–1695PubMedGoogle Scholar
  66. Houska L, Wolfová M, Fiedler J (2004) Economic weights for production and reproduction traits of pigs in the Czech Republic. Livest Prod Sci 85(2–3):209–221Google Scholar
  67. Hughes PE (2001) Factors affecting gilt age and liveweight at puberty. In: Proceedings of the 6th international conference on pig reproduction, ColumbiaGoogle Scholar
  68. Hughes PE, Pearce GP, Paterson AM (1990) Mechanisms mediating the stimulatory effects of the boar on gilt reproduction. J Reprod Fertil Suppl 40:323–341PubMedGoogle Scholar
  69. Huhn U, Jochle W, Brussow KP (1996) Techniques developed for the control of estrus, ovulation and parturition, in the East German pig industry: a review. Theriogenology 46:911–924PubMedGoogle Scholar
  70. Jackson AL, Breen SM, Rodriguez-Zas SL, Knox RV (2006) Evaluation of methodology for administration of porcine FSH for use in estrus induction and for increasing ovulation rate in prepubertal gilts. Theriogenology 66(4):1042–1047PubMedGoogle Scholar
  71. Johnson LA (1985) Fertility results using frozen boar spermatozoa; 1970-1985. In: Johnson LA Larsson K (eds) Proceedings of the first international conference on deep freezing of boar semen, Uppsala, pp 199–222Google Scholar
  72. Johnson LA (2000) Sexing mammalian sperm for production of offspring: the state-of-the-art. Anim Reprod Sci 60–61:93–107PubMedGoogle Scholar
  73. Johnson LA, Weitze KF, Fiser P, Maxwell WMC (2000) Storage of boar semen. Anim Reprod Sci 62:143–172PubMedGoogle Scholar
  74. Jones GF (1998) Genetic aspects of domestication, common breeds and their origin. In: Rothschild MF, Ruvinsky A (eds) The genetics of the pig. C.A.B. International, WallingfordGoogle Scholar
  75. Kaeoket K (2006) The effect of dose and route of administration of R-cloprostenol on the parturient response of sows. Reprod Domest Anim 41(5):472–476PubMedGoogle Scholar
  76. Kauffold J, Rautenberg T, Richter A, Waehner M, Sobiraj A (2004) Ultrasonographic characterization of the ovaries and the uterus in prepubertal and pubertal gilts. Theriogenology 61(9):1635–1648PubMedGoogle Scholar
  77. Kemp B, Soede NM (1996) Relationship of weaning-to-estrus interval to timing of ovulation and fertilization in sows. J Anim Sci 74(5):944–949PubMedGoogle Scholar
  78. Key N (2007) The changing economics of U.S. hog production. [Economic research report no. 52, economic research service]. United States Department of Agriculture, Washington, DCGoogle Scholar
  79. Kirkwood RN, Aherne FX, Monaghan PG, Misutka SC (2000) Breeding gilts at natural or a hormone-induced estrus: effects on performance over four parities. J Swine Health Prod 8:177–179Google Scholar
  80. Knauer M, Stalder KJ, Serenius T, Baas TJ, Berger PJ, Karriker L, Goodwin RN, Johnson RK, Mabry JW, Miller RK, Robison OW, Tokach MD (2010) Factors associated with sow stayability in 6 genotypes. J Anim Sci 88(11):3486–3492PubMedGoogle Scholar
  81. Knox RV (2004) The real impact of boars in breeding programs. Adv Pork Prod 15:307–314Google Scholar
  82. Knox RV (2011) The current value of frozen-thawed boar semen for commercial companies. Reprod Domest Anim 46:4–6PubMedGoogle Scholar
  83. Knox RV, Althouse GC (1999) Visualizing the reproductive tract of the female pig using real-time ultrasound. J Swine Health Prod 7:207–215Google Scholar
  84. Knox R, Flowers W (2006). Real time ultrasound for pregnancy diagnosis in swine. Pork Information Gateway. http://www.porkgateway.org
  85. Knox R, Probst-Miller S (2004) Evaluation of transrectal real-time ultrasound for use in identifying sources of reproductive failure in weaned sows. J Swine Health Prod 12:71–74Google Scholar
  86. Knox RV, Rodriguez-Zas SL (2001) Factors influencing estrus and ovulation in weaned sows as determined by transrectal ultrasound. J Anim Sci 79(12):2957–2963PubMedGoogle Scholar
  87. Knox RV, Wilson WD (2007) Induction of estrus and control of the estrous cycle in swine. In: Youngquist RS, Threlfall WR (eds) Current therapy in large animal theriogenology, 2nd edn. Saunders Elsevier, St. Louis, MO, pp 757–764Google Scholar
  88. Knox RV, Rodriguez-Zas SL, Tudor KW, Robb JA (2000) Effect of subcutaneous or intramuscular administration of PG600 on estrus and ovulatory responses in prepubertal gilts. J Anim Sci 78:1732–1737PubMedGoogle Scholar
  89. Knox RV, Rodriguez-Zas SL, Miller GM, Willenburg KL, Robb JA (2001) Administration of P.G. 600 to sows at weaning and the time of ovulation as determined by transrectal ultrasound. J Anim Sci 79(4):796–802PubMedGoogle Scholar
  90. Knox RV, Miller G, Willenburg KL, Rodriguez-Zas SL (2002) Effect of frequency of boar exposure and adjusted mating times on measures of reproductive performance in weaned sows. J Anim Sci 80:892–899PubMedGoogle Scholar
  91. Knox RV, Breen SM, Willenburg KL, Roth S, Miller GM, Ruggiero KM, Rodriguez-Zas S (2004) Effect of housing system and boar exposure on estrus expression in weaned sows. J Anim Sci 82:3088–3093PubMedGoogle Scholar
  92. Knox R, Levis D, Safranski T, Singleton W (2008) An update on North American boar stud practices. Theriogenology 70(8):1202–1208PubMedGoogle Scholar
  93. Knox RV, Willenburg KL, Rodriguez-Zas SL, Greger DL, Hafs HD, Swanson ME (2011) Synchronization of ovulation and fertility in weaned sows treated with intravaginal triptorelin is influenced by timing of administration and follicle size. Theriogenology 75(2):308–319PubMedGoogle Scholar
  94. Knox RV, Rodriguez Zas SL, Sloter NL, McNamara KA, Gall TJ, Levis DG, Safranski TJ, Singleton WL (2013) An analysis of survey data by size of the breeding herd for the reproductive management practices of North American sow farms. J Anim Sci 91(1):433–445PubMedGoogle Scholar
  95. Koketsu Y (2007) Longevity and efficiency associated with age structures of female pigs and herd management in commercial breeding herds. J Anim Sci 85(4):1086–1091PubMedGoogle Scholar
  96. Koketsu Y, Dial GD (1997) Factors influencing the postweaning reproductive performance of sows on commercial farms. Theriogenology 47:1445–1461PubMedGoogle Scholar
  97. Konig S, Simianer H, Willam A (2009) Economic evaluation of genomic breeding programs. J Dairy Sci 92(1):382–391PubMedGoogle Scholar
  98. Lamberson WR, Safranski TJ (2000) A model for economic comparison of swine insemination programs. Theriogenology 54(5):799–807PubMedGoogle Scholar
  99. Langendijk P, van den Brand H, Soede NM, Kemp B (2000a) Effect of boar contact on follicular development and on estrus expression after weaning in primiparous sows. Theriogenology 54(8):1295–1303PubMedGoogle Scholar
  100. Langendijk P, Soede NM, Bouwman EG, Kemp B (2000b) Responsiveness to boar stimuli and change in vulvar reddening in relation to ovulation in weaned sows. J Anim Sci 78(12):3019–3026PubMedGoogle Scholar
  101. Langendijk P, Soede NM, Kemp B (2000c) Effects of boar contact and housing conditions on estrus expression in weaned sows. J Anim Sci 78(4):871–878PubMedGoogle Scholar
  102. Langendijk P, Soede NM, Kemp B (2005) Uterine activity, sperm transport, and the role of boar stimuli around insemination in sows. Theriogenology 63(2):500–513PubMedGoogle Scholar
  103. Lawrence JD, Grimes G (2006) Production and marketing characteristics of U.S. pork producers, 2006. Farm marketing-AgEBB. Iowa State University Department of Economics, Ames, IA, pp 1–22Google Scholar
  104. Levis DL (1997a) Management of replacement gilts for efficient reproduction. In: Cooperative extension, University of Nebraska, Lincoln, NE, pp 1–11Google Scholar
  105. Levis D (1997b) EC97-275 Effect of lactation length on sow reproductive performance. University of Nebraska Extension, Lincoln, NE, pp 1–13Google Scholar
  106. Levis D (2000) Liquid boar semen production: current extender technology and where do we go from here? In: Johnson LA, Guthrie HD (eds) Boar semen preservation IV. Allen Press, Lawrence, KS, pp 121–128Google Scholar
  107. Levis DG (2005) Applying new technologies to optimize reproduction. Seminar: optimizing reproductive efficiency. In: Proceedings 36th American association of swine veterinarians annual meeting, TorontoGoogle Scholar
  108. Lofgren DL, Harris DL, Stewart TS, Schinckel AP (1989) Adapting best linear unbiased prediction (BLUP) for timely genetic evaluation: II. Progeny traits in multiple contemporary groups within a herd. J Anim Sci 67(12):3223–3242PubMedGoogle Scholar
  109. Love RJ, Evans G, Klupiec C (1993) Season effects on fertility in gilts and sows. J Reprod Fertil Suppl 48:191–206PubMedGoogle Scholar
  110. Madsen KS (2005) Management of disease control and epidemics in AI in Denmark. Theriogenology 63(2):585–594PubMedGoogle Scholar
  111. Maes D, Nauwynck H, Rijsselaere T, Mateusen B, Vyt P, de Kruif A, Van Soom A (2008) Diseases in swine transmitted by artificial insemination: an overview. Theriogenology 70(8):1337–1345PubMedGoogle Scholar
  112. Martin M, Edgerton S, Wiseman B (2000) Frozen semen: a breeding protocol that results in high fecundity. J Swine Health Prod 8(6):275–277Google Scholar
  113. Martinez EA, Vazquez JM, Roca J, Lucas X, Gil MA, Parrilla I, Vazquez JL, Day BN (2001) Successful non-surgical deep intrauterine insemination with small numbers of spermatozoa in sows. Reproduction 122(2):289–296PubMedGoogle Scholar
  114. Martinez E, Vazquez J, Roca J, Lucas X, Gil M, Parrilla I, Vazquez J, Day B (2002) Minimum number of spermatozoa required for normal fertility after deep intrauterine insemination in non-sedated sows. Reproduction 123(1):163–170PubMedGoogle Scholar
  115. Martinez EA, Caamaño JN, Gil MA, Rieke A, McCauley TC, Cantley TC, Vazquez JM, Roca J, Vazquez JL, Didion BA, Murphy CN, Prather RS, Day BN (2004) Successful nonsurgical deep uterine embryo transfer in pigs. Theriogenology 61(1):137–146PubMedGoogle Scholar
  116. Martinez EA, Vazquez JM, Parrilla I, Cuello C, Gil MA, Rodriguez-Martinez H, Roca J, Vazquez JL (2006) Incidence of unilateral fertilizations after Low dose deep intrauterine insemination in spontaneously ovulating sows under field conditions. Reprod Domest Anim 41(1):41–47PubMedGoogle Scholar
  117. Merks JWM, Ducro-Steverink DWB, Feitsma H (2000) Management and genetic factors affecting fertility in sows. Reprod Domest Anim 35:261–266Google Scholar
  118. Moeller SJ, Goodwin RN, Johnson RK, Mabry JW, Bass TJ, Robison OW (2004) The national pork producers council maternal line national genetic evaluation program: a comparison of six maternal genetic lines for female productivity measures over four parities. J Anim Sci 82:41–53PubMedGoogle Scholar
  119. Moore C (2005) Parity segregation. In: Proceedings of the London swine conference. http://www.londonswineconference.ca/proceedings/…/LSC2005_CMoore.p
  120. Morrow DA (1986) Current therapy in theriogenology, 2nd edn. Saunders, Philadelphia, PAGoogle Scholar
  121. Mozo-Martín R, Gil L, Gómez-Rincón CF, Dahmani Y, García-Tomás M, Úbeda JL, Grandía J (2012) Use of a novel double uterine deposition artificial insemination technique using low concentrations of sperm in pigs. Vet J 193(1):251–256PubMedGoogle Scholar
  122. Muirhead MR (1990) Reproductive failure in the sow. Vet Annu 30:92–102Google Scholar
  123. Nissen AK, Lehn-Jensen H, Hyttel P, Greve T (1995) Follicular development and ovulation in sows: effect of hCG and GnRH treatment. Acta Vet Scand 36:123–133PubMedGoogle Scholar
  124. Nissen AK, Soede NM, Hyttel P, Schmidt M, D’Hoore L (1997) The influence of time of insemination relative to time of ovulation on farrowing frequency and litter size in sows, as investigated by ultrasonography. Theriogenology 47:1571–1582PubMedGoogle Scholar
  125. Nissen AK, Schmidt M, Hyttel P, Greve T (2000) Ovulation and embryonic developmental rate following hCG-stimulation in sows. Acta Vet Scand 41:321–328PubMedGoogle Scholar
  126. Nodelijk G, Nielen M, De Jong MCM, Verheijden JHM (2003) A review of porcine reproductive and respiratory syndrome virus in Dutch breeding herds: population dynamics and clinical relevance. Prev Vet Med 60(1):37–52PubMedGoogle Scholar
  127. NPPC (2012) Benefits of expanding U.S. pork exports. http://www.nppc.org/issues/international-trade/
  128. NSR (2012) Swine testing and evaluation system. National Swine Registry. http://www.nationalswine.com/Genetic_Tech_pages/STAGES.html
  129. Olesen I, Groen AF, Gjerde B (2000) Definition of animal breeding goals for sustainable production systems. J Anim Sci 78:570–582PubMedGoogle Scholar
  130. Ollivier L (1998) Gentic improvement of the pig. In: Rothschild MF, Ruvinsky A (eds) The genetics of the pig. C.A.B. International, WallingfordGoogle Scholar
  131. Paterson AM, Lindsay DR (1981) Induction of puberty in gilts. Anim Prod 32:51–54Google Scholar
  132. Peña FJ, Domínguez JC, Carbajo M, Anel L, Alegre B (1998) Treatment of swine summer infertility syndrome by means of oxytocin under field conditions. Theriogenology 49(4):829–836PubMedGoogle Scholar
  133. PIC (2008) Fundamentals of gilt and sow management, pp 1–32. http://www.pic.com
  134. PIG Factsheets: Statistics (2012) Pork information gateway. http://www.porkgateway.org/PigLibrary/LT/Factsheets.aspx
  135. PigCHAMP (1998) Breeding herd summary—USA. PigCHAMP Data ShareGoogle Scholar
  136. PigCHAMP (2001) http://www.pigchampinc.com/2001Datashare.htm. Accessed 6 Jan 2005
  137. PigCHAMP (2011). Data summary. Benchmark.Farms.Com. http://www.pigchamp.com/LinkClick.aspx?fileticket=NMdM5F73gKE%3d&tabid=115
  138. PIH (2007) Pork Industry Handbook TPI Purdue extension. Purdue University, West Lafayette, INGoogle Scholar
  139. Prieto C, Castro JM (2005) Porcine reproductive and respiratory syndrome virus infection in the boar: a review. Theriogenology 63(1):1–16PubMedGoogle Scholar
  140. Purdy PH (2008) Swine gene banking: a quality control perspective on collection, and analysis of samples for a national repository. Theriogenology 70(8):1304–1309PubMedGoogle Scholar
  141. Pursel VG, Schulman LL, Johnson LA (1978) Distribution and morphology of fresh and frozen-thawed sperm in the reproductive tract of gilts after artificial insemination. Biol Reprod 19(1):69–76PubMedGoogle Scholar
  142. Rath D, Bathgate R, Rodriguez-Martinez H, Roca J, Strzezek J, Waberski D (2009a) Recent advances in boar semen cryopreservation. Soc Reprod Fertil Suppl 66:51–66PubMedGoogle Scholar
  143. Rath D, Moench-Tegeder G, Taylor U, Johnson LA (2009b) Improved quality of sex-sorted sperm: a prerequisite for wider commercial application. Theriogenology 71(1):22–29PubMedGoogle Scholar
  144. Reese D, Straw BE (2006) Paper 212: the case against evening-up litters until weaning. In: Nebraska swine report, University of Nebraska Extension, Lincoln, NE, pp 7–10Google Scholar
  145. Reicks DL (2008) PRRS monitoring techniques and success stories. In: Proceedings of the midwest boar stud manager’s conference II, St. Louis, MOGoogle Scholar
  146. Reicks DL (2012) Interpretation of PRRS tests and Implications for stud management. In: Midwest boar stud manager’s conference IV, St. Louis, MOGoogle Scholar
  147. Reicks DL, Levis DG (2008) Fertility of semen used in commercial production and the impact of sperm numbers and bacterial counts. Theriogenology 70(8):1377–1379PubMedGoogle Scholar
  148. Reisenbeck A (2011) Review on international trade with boar semen. Reprod Domest Anim 46(suppl 2):1–3Google Scholar
  149. Roca J, Carvajal G, Lucas X, Vazquez JM, Martinez EA (2003) Fertility of weaned sows after deep intrauterine insemination with a reduced number of frozen-thawed spermatozoa. Theriogenology 60(1):77–87PubMedGoogle Scholar
  150. Rodriguez-Martinez H (2003) Laboratory semen assessment and prediction of fertility: still utopia? Reprod Domest Anim 38(4):312–318PubMedGoogle Scholar
  151. Rozeboom KJ, Troedsson MH, Shurson GC, Hawton JD, Crabo BG (1997) Late estrus or metestrus insemination after estrual inseminations decreases farrowing rate and litter size in swine. J Anim Sci 75(9):2323–2327PubMedGoogle Scholar
  152. Ruiz-Sánchez AL, O’Donoghue R, Novak S, Dyck MK, Cosgrove JR, Dixon WT, Foxcroft GR (2006) The predictive value of routine semen evaluation and IVF technology for determining relative boar fertility. Theriogenology 66(4):736–748PubMedGoogle Scholar
  153. Ruvinsky A, Rothschild MF (1998) Systematics and evolution of the pig. In: Rothschild MF, Ruvinsky A (eds) The genetics of the pig. C.A.B. International, WallingfordGoogle Scholar
  154. Safranski TJ, Ford JJ, Rohrer GA, Guthrie HD (2011) Plenary contribution to international conference on boar semen preservation 2011. Genetic selection for freezability and its controversy with selection for performance. Reprod Domest Anim 46:31–34PubMedGoogle Scholar
  155. Schinckel AP, Bennet G (1999) The economic impact of genetic improvement. Natl Swine Improv Fed 1(9/2006):1–8Google Scholar
  156. Schukken YH, Buurman J, Huirne RB, Willemse AH, Vernooy JC, van den Broek J, Verheijden JH (1994) Evaluation of optimal age at first conception in gilts from data collected in commercial swine herds. J Anim Sci 72(6):1387–1392PubMedGoogle Scholar
  157. Singleton WL (2001) State of the art in artificial insemination of pigs in the United States. Theriogenology 56(8):1305–1310PubMedGoogle Scholar
  158. Soede NM (1993) Boar stimuli around insemination affect reproductive processes in pigs: a review. Anim Reprod Sci 32:107–125Google Scholar
  159. Soede NM, Noordhuizen JPTM, Kemp B (1992) The duration of ovulation in pigs, studied by transrectal ultrasonography, is not related to early embryonic diversity. Theriogenology 38:653–666PubMedGoogle Scholar
  160. Soede N, Wetzels C, Zondag W, de Koning M, Kemp B (1995a) Effects of time of insemination relative to ovulation, as determined by ultrasonography, on fertilization rate and accessory sperm count in sows. J Reprod Fertil 104(1):99–106PubMedGoogle Scholar
  161. Soede NM, Wetzels CC, Zondag W, Hazeleger W, Kemp B (1995b) Effects of a second insemination after ovulation on fertilization rate and accessory sperm count in sows. J Reprod Fertil 105(1):135–140PubMedGoogle Scholar
  162. Sonderman JP, Luebbe JJ (2008) Semen production and fertility issues related to differences in genetic lines of boars. Theriogenology 70:1380–1383PubMedGoogle Scholar
  163. Spencer KW, Purdy PH, Blackburn HD, Spiller SF, Stewart TS, Knox RV (2010) Effect of number of motile, frozen-thawed boar sperm and number of fixed-time inseminations on fertility in estrous-synchronized gilts. Anim Reprod Sci 121:259–266PubMedGoogle Scholar
  164. Sporke J, Patterson JL, Beltranena E, Foxcroft GR (2005) Gilt development unit management using Matrix and PG600 in a commercial swine operation. In: Allen D. Leman swine conference, University of Minnesota, St. Paul, MNGoogle Scholar
  165. Spötter A, Distl O (2006) Genetic approaches to the improvement of fertility traits in the pig. Vet J 172(2):234–247PubMedGoogle Scholar
  166. Stalder K (2008) Parity’s impact on productivity, Feb 15 genetics-reproduction. Natl Hog Farmer 53:28Google Scholar
  167. Stalder KJ, Lacy RC, Cross TL, Conatser GE (2003) Financial impact of average parity of culled females in a breed-to-wean swine operation using replacement gilt net present value analysis. J Swine Health Prod 11:69–74Google Scholar
  168. Steverink DW, Soede NM, Bouwman EG, Kemp B (1997) Influence of insemination-ovulation interval and sperm cell dose on fertilization in sows. J Reprod Fertil Suppl 111:165–171Google Scholar
  169. Steverink DW, Soede NM, Bouwman EG, Kemp B (1998) Semen backflow after insemination and its effect on fertilisation results in sows. Anim Reprod Sci 54(2):109–119PubMedGoogle Scholar
  170. Steverink DW, Soede NM, Groenland GJ, van Schie FW, Noordhuizen JP, Kemp B (1999) Duration of estrus in relation to reproduction results in pigs on commercial farms. J Anim Sci 77(4):801–809PubMedGoogle Scholar
  171. Stewart KR, Flowers WL, Rampacek GB, Greger DL, Swanson ME, Hafs HD (2010) Endocrine, ovulatory and reproductive characteristics of sows treated with an intravaginal GnRH agonist. Anim Reprod Sci 120(1–4):112–119PubMedGoogle Scholar
  172. Straw BE, D’Allaire WLMS, Taylor DJ (eds) (1999) Diseases of swine, 8th edn. Iowa State University Press, Ames, IAGoogle Scholar
  173. Taibl JN, Breen SM, Webel SK, Knox RV (2008a) Induction of ovulation using a GnRH agonist for use with fixed time AI in weaned sows. Theriogenology 70:1400 (abstract)Google Scholar
  174. Taibl JN, Breen SM, Webel SK, Swanson ME, Knox RV (2008) Effect of synchronizing ovulation in weaned sows using Ovugel with single fixed time AI on pregnancy rate and litter size. In: VIII International conference on pig reproduction, BanffGoogle Scholar
  175. Tarocco C, De Rensis F, Kirkwood RN, Yang R (2000) Effect of split weaning interval on return to estrus and sow fertility. J Swine Health Prod 8:221–223Google Scholar
  176. Taylor RE, Field TG (1998) Scientific farm animal production, 6th edn. Prentice Hall, Upper Saddle River, NJGoogle Scholar
  177. Tilton JE, Cole DJA (1982) Effect of triple versus double mating on sow productivity. Anim Sci 34(03):279–282Google Scholar
  178. Tummaruk P, Lundeheim N, Einarsson S, Dalin AM (2001) Effect of birth litter size, birth parity number, growth rate, backfat thickness and age at first mating of gilts on their reproductive performance as sows. Anim Reprod Sci 66(3–4):225–237PubMedGoogle Scholar
  179. Tummaruk P, Tantasuparuk W, Techakumphu M, Kunavongkrit A (2007) Age, body weight and backfat thickness at first observed oestrus in crossbred landrace × Yorkshire gilts, seasonal variations and their influence on subsequence reproductive performance. Anim Reprod Sci 99(1–2):167–181PubMedGoogle Scholar
  180. USDA-NASS (2010) National agricultural statistics service: hogs and pigs. http://www.nass.usda.gov/Statistics_by_Subject/index.php?sector=ANIMALS%20&%20PRODUCTS. Accessed 28 March 2013
  181. USDA-APHIS (2006) National animal health monitoring system: swine. http://www.aphis.usda.gov/animal_health/nahms/swine/index.shtml. Accessed 28 March 2013
  182. USDA-NASS (2008) Hogs and pigs. National Agricultural Statistics Service, Washington, DC. http://www.nass.usda.gov/QuickStats/index2.jsp
  183. van Leeuwen JJJ, Martens MRTM, Jourquin J, Driancourt MA, Kemp B, Soede NM (2011) Effects of altrenogest treatments before and after weaning on follicular development, farrowing rate, and litter size in sows. J Anim Sci 89(8):2397–2406PubMedGoogle Scholar
  184. Vargas AJ, Bernardi ML, Bortolozzo FP, Mellagi APG, Wentz I (2009) Factors associated with return to estrus in first service swine females. Prev Vet Med 89(1–2):75–80PubMedGoogle Scholar
  185. Vazquez JM, Martinez EA, Roca J, Gil MA, Parrilla I, Cuello C, Carvajal G, Lucas X, Vazquez JL (2005) Improving the efficiency of sperm technologies in pigs: the value of deep intrauterine insemination. Theriogenology 63(2):536–547PubMedGoogle Scholar
  186. Vazquez JM, Roca J, Gil MA, Cuello C, Parrilla I, Caballero I, Vazquez JL, Martinez EA (2008) Low-dose insemination in pigs: problems and possibilities. Reprod Domest Anim 43(Suppl 2):347–354PubMedGoogle Scholar
  187. von Rohr P, Hofer A, Kunzi N (1999) Economic values for meat quality traits in pigs. J Anim Sci 77(10):2633–2640Google Scholar
  188. Vyt P, Maes D, Dejonckheere E, Castryck F, Van Soom A (2004) Comparative study on five different commercial extenders for boar semen. Reprod Domest Anim 39(1):8–12PubMedGoogle Scholar
  189. Waberski D, Weitze KF, Gleumes T, Schwartz M, Willmen T, Petzoldt R (1994) Effect of time of insemination relative to ovulation on fertility with liquid and frozen boar semen. Theriogenology 42:831–840PubMedGoogle Scholar
  190. Walton JS (1986) Effect of boar presence before and after weaning on estrus and ovulation in sows. J Anim Sci 62:9–15PubMedGoogle Scholar
  191. Watson PF, Behan JR (2002) Intrauterine insemination of sows with reduced sperm numbers: results of a commercially based field trial. Theriogenology 57:1683–1693PubMedGoogle Scholar
  192. Webel SK, Day BN (1982) The control of ovulation. In: Cole DJA, Foxcroft GR (eds) Control of pig reproduction. Butterworths, LondonGoogle Scholar
  193. Weitze KF (2000) Update on the worldwide application of swine AI. In: Johnson LA, Guthrie HD (eds) Boar semen preservation IV. Allen Press, Lawrence, KS, pp 141–146Google Scholar
  194. Weitze KF, Wagner-Reitschel H, Waberski D, Richter L, Krieter J (1994) The onset of heat after weaning, heat duration, and ovulation as major factors in AI timing in sows. Reprod Domest Anim 29:433–443Google Scholar
  195. Whiting TL (2003) Foreign animal disease outbreaks, the animal welfare implications for Canada: risks apparent from international experience. Can Vet J 44(10):805–815PubMedGoogle Scholar
  196. Whittemore C (1998) The science and practice of pig production, 2nd edn. Blackwell, OxfordGoogle Scholar
  197. Willenburg KL, Miller GM, Rodriguez-Zas SL, Knox RV (2003a) Influence of hormone supplementation to extended semen on artificial insemination, uterine contractions, establishment of a sperm reservoir, and fertility in swine. J Anim Sci 81(4):821–829PubMedGoogle Scholar
  198. Willenburg KL, Miller GM, Rodriguez-Zas SL, Knox RV (2003b) Effect of boar exposure at time of insemination on factors influencing fertility in gilts. J Anim Sci 81:9–15PubMedGoogle Scholar
  199. Wuensch U, Nitter G, Bergfeld U, Schueler L (2000) Genetic and economic evaluation of genetic improvement schemes in pigs. II. Comparison of selection strategies in a three-way crossbreeding scheme. Arch Tierz 43(2):139–149Google Scholar
  200. Xue J, Dial GD, Trigg T, Davies P, King VL (1998) Influence of mating frequency on sow reproductive performance. J Anim Sci 76:2962–2966PubMedGoogle Scholar
  201. Zimmerman DR, McGargill T, Rohda N (1998) Efficacy of once (1x) vs twice (2x) daily physical or fence-line contact with boars for stimulating earlier puberty in gilts. In: Nebraska swine report, Lincoln, NE, pp 3–4Google Scholar

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© Springer Science+Business Media New York 2014

Authors and Affiliations

  1. 1.Department of Animal SciencesUniversity of IllinoisUrbanaUSA

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