Cytologic, hormonal, and ultrasonographic correlates of the menstrual cycle of the New World monkey Cebus apella

• DOI: 10.1002/ajp.20141
• Publication Date: 2005-07-13T23:24:03Z
• Authors: R.E. Ortiz; A.C. Ortiz; G. Gajardo; A.J. Zepeda; V.H. Parraguez; M.E. Ortiz; H.B. Croxatto
• Keywords: Menstruation

Abstract Few reports on the reproductive physiology of Cebus apella have been published. In this study we characterized menstrual cycle events by means vaginal cytology, ultrasonography (US), and hormonal measurements in serum during three consecutive cycles 10 females, assessed probability that ovulation would occur same ovary 18 females. The lengths phases were determined according to cytology. Taking first day endometrial bleeding as cycle, mean length ± SEM was 19.5±0.4 days, with follicular luteal lasting 8.2±0.2 11.3±0.4 respectively. phase included menstruation periovulatory period, which presence a large number superficial eosinophilic cells smear. myometrium, endometrium, ovaries clearly distinguished US examination. During each single follicle recruited at random from either ovary. grew 3 mm maximum diameter 8–9 over course 8 association increasing estradiol (E 2 ) levels (from 489±41 1600±92 pmol/L). At ovulation, dominant usually decreased >20%, 1 after E level reached. Ovulation associated an abrupt fall , cells, leukocytes intermediate smear, progressive increase progesterone (P) reached 892±65 nmol/L days 3–6 phase. differs several temporal quantitative aspects humans Old World primates, but it exhibits correlations between ovarian endocrine morphologic parameters. Am. J. Primatol. 66:233–244, 2005. © 2005 Wiley‐Liss, Inc.