Abstract
The goat is a seasonal breeder and usually gives birth once a year. The earliest sign of pregnancy after mating or artificial insemination (AI) is the absence of oestrus. This can only be detected during the oestrous season, but even then not all non-pregnant goats will return to oestrus. Another complicating factor is that some pregnant goats may show signs of false heat. For a more evenly distributed milk production through the year, farmers sometimes want their does to give birth in the autumn. This means that oestrus and ovulation have to be induced by hormonal treatment during the anoestrous season. Unfortunately, the pregnancy rate after mating during the anoestrous season is always lower than that during the oestrous season (Corteel et al. 1982). It is assumed that mating after hormonal treatment will result in more pseudopregnancies (Mizinga et al. 1984).
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Barker, C.A.V. and Cawley, A.J. (1967) “Radiographic detection of fetal numbers in goats”, Can. Vet. J. 8, 59–61.
Berkley, P.M. (1982) “Pregnancy testing of goats using ultarasonics”, Goat Vet. Soc. J. 3, 13–14.
Botero-Herrera, O., Gonzâlez-Stagnaro, C., Poulin, N. and Cognie, Y. (1984) “Diagnostico precoz de la gestacion en las cabras y ovejas utilizando la echografia de ultrasonido por via rectal”, Proceedings 10th Int. Congr. Anim. Reprod. and A.I., Urbana, Illinios, volume II, 79.
Corteel, J.M., Gonzalez, C. and Nunes, J.F. (1982) “Research and development in the control of reproduction”, Proceedings 3rd Int. Congr. on Goat Production and Disease, Tucson, Arizona, pp. 584–591.
Davis, J. and Chaplin, V.M. (1983) “A caprine pregnancy test based upon measurement of oestrone sulphate in milk”, Proceedings 3rd Int. Symp. World Assoc. Vet. Lab. Diagn., Ames, Iowa, 1, 119–125.
Holdsworth, R.J. and Davis, J. (1979) “ Measurement of progesterone in goats milk: an early pregnancy test”, Vet. Rec. 105, 535.
Mizinga, K.M. and Verma, O.P. (1984) “LHRH-induced ovulation and fertility of anoestrus goats”, Theriogenology 21, 435–446.
Ott, R.S., Brown, W.F., Lock, T.F., Memon. M.A. and Stowater, J.L. (1981) “A comparison of intrarectal doppler and rectal abdominal palpation for pregnancy testing in goats”, J. Am. Vet. Med. Assoc. 178, 730–731.
Pieterse, M.C. and Taverne, M.A.M. (1986) “ Hydrometra in goats: Diagnosis with real-time ultrasound and treatment with prostaglandins or oxytocin”, Theriogenology 26, 813–821.
Smith, M.C. (1986) “Anoestrus, Pseudopregnancy and cystic Follicles”, in: D.A. Morrow (ed.), Current Therapy in Theriogenology 2, W.B Saunders, Philadelphia, pp. 585–586.
Taverne, M.A.M., Lavoir, M.C., van Oord, R. and van der Weyden, G.C. (1985) “Accuracy of pregnancy diagnosis and prediction of fetal numbers in sheep with linear-array real-time ultrasound scanning”, Vet. Quaterly 7, 256–263.
Wani, G.M. (1981) “Ultrasonic pregnancy diagnosis in sheep and goats: A review ”, World Review of Anim. Prod. 17, 43–48.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1989 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Lavoir, M.C., Taverne, M.A.M. (1989). The Diagnosis of Pregnancy and Pseudopregnancy, and the Determination of Foetal Numbers of Goats, by Means of Real-Time Ultrasound Scanning. In: Taverne, M.A.M., Willemse, A.H. (eds) Diagnostic Ultrasound and Animal Reproduction. Current Topics in Veterinary Medicine and Animal Science, vol 51. Springer, Dordrecht. https://doi.org/10.1007/978-94-017-1249-1_8
Download citation
DOI: https://doi.org/10.1007/978-94-017-1249-1_8
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-4053-4
Online ISBN: 978-94-017-1249-1
eBook Packages: Springer Book Archive