, Volume 27, Issue 4, pp 493–506 | Cite as

Concentrations of steroids in the utero-ovarian vein blood, serially collected from the two sides of individual baboons, during the follicullar phase

  • A. A. Shaikh
  • E. E. Gbur
  • S. A. Shaikh


The purpose of this study was to determine and compare the follicular phase steroid hormone secretion into the utero-ovarian vein by the ovary with a dominant follicle and the contralateral ovary in the same baboon. Serial utero-ovarian vein blood from both sides was collected in 25 baboons by the use of a laparoscope on alternate days, starting on day 1 or 3 of the cycle and continuing through 2 to 3 days post-ovulation. Approximately 3–4 days before the day of expected ovulation, samples were collected at 8-hr intervals. Steroids estradiol (E2) and progesterone (P) were measured in all utero-ovarian vein plasma by radioimmunoassay. In the peripheral plasma, E2, P, LH, and FSH measurements were carried out. Concentrations of steroids were significantly higher on the side of the ovulating ovary by day 5 before ovulation. Individual plots however, indicated that some baboons may establish the dominant side as early as day 11 before ovulation. The preovulatory gonadotropins had a differential effect on the two ovaries. For example, E2 values on the ovulatory side ovary declined after increases in LH/FSH, whereas on the contralateral side these values had increased. Both sides showed increases in the level of P with the increases in LH. The mean interval from E2 peak to LH peak was 24 hrs and LH peak to ovulation was 24 hrs.

Key Words

Baboons Ovary Steroids Gonadotropins Follicular phase 


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Copyright information

© Japan Monkey Centre 1986

Authors and Affiliations

  • A. A. Shaikh
    • 1
  • E. E. Gbur
    • 2
  • S. A. Shaikh
    • 2
  1. 1.Department of Veterinary PhysiologyTexas A&M UniversityCollege StationUSA
  2. 2.The Institute of StatisticsTexas A&M UniversityCollege StationUSA

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