Biol Reprod Keystone Symposia Conference on Frontiers in Reproductive Biology & Regulation of Fertility.
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Biology of Reproduction, Vol 48, 1113-1119, Copyright © 1993 by Society for the Study of Reproduction

ARTICLES

Follicular development and ovulation in the marmoset monkey as determined by repeated laparoscopic examination

SD Tardif, HM Lacker and M Feuer
Department of Anthropology, University of Tennessee, Knoxville 37996.

This paper describes the course of follicular development in vivo in the marmoset monkey, the only anthropoid primate with a relatively high (2-4) and variable ovulation number. Results are presented in relation to predictions from a mathematical model of control of follicle selection and ovulation number. Repeated laparoscopic examinations during the follicular phase were conducted for 14 cycles. Ovulatory follicles were 1.0 mm (median) in diameter at Day 6 and could be distinguished from nonovulatory follicles by Day 8, at which point they were 2.0 mm in diameter. Ovulations were not synchronous; the most common observation 1-2 days after the estradiol peak was ovulation of one follicle but not the other. Examination of the course of follicular development within a cycle and the distribution of ovulation sites both supported predictions stemming from a mathematical model of follicle selection developed by Lacker et al. [Biol Reprod 1987; 37:570-580]. Specific findings were the following: 1) Variations in patterns of follicle growth within a cycle resembled those generated by the model; in 64% of cycles, the 2-3 ovulatory follicles grew at similar rates. However, in 36% of cycles, ovulatory follicles displayed disparate rates of growth. 2) An examination of the distribution of ovulation sites (right versus left) revealed no significant difference from a binomial distribution, suggesting the likelihood that interovarian (rather than intraovarian) factors control this distribution.


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R.B. Gilchrist, M. Wicherek, M. Heistermann, P.L. Nayudu, and J.K. Hodges
Changes in Follicle-Stimulating Hormone and Follicle Populations During the Ovarian Cycle of the Common Marmoset
Biol Reprod, January 1, 2001; 64(1): 127 - 135.
[Abstract] [Full Text]


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Copyright © 1993 by the Society for the Study of Reproduction.