Correlation of perineal swelling with serum ovarian hormone levels,vaginal cytology,and ovarian follicular development during the baboon reproductive cycle |
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Authors: | D E Wildt L L Doyle S C Stone Richard M Harrison |
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Institution: | (1) Delta Regional Primate Research Center, USA;(2) Present address: Institute of Comparative Medicine, Baylor College of Medicine, Texas Medical Center, 77025 Houston, Texas, USA;(3) Present address: University of Arkansas Medical School, 72001 Little Rock, Arkansas, USA;(4) Present address: Medical Center, Louisiana State University, 70112 New Orleans, LA, USA;(5) Present address: Delta Regional Primate Research Center, Tulane University, 70433 Covington, Louisiana, USA |
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Abstract: | Perineal swelling was correlated with changes in vaginal cytology and serum ovarian hormone levels and with development of
the ovarian follicle. The average length of 66 menstrual cycles as seen in 12 mature baboons was 35.7±.66 days with a range
of 25 to 47 days. Laparoscopic observations and photographic documentation of follicular development were made as early as
13 days prior to ovulation with the most rapid follicular maturation occurring 24 to 48 hours before ovulation. In 38.5% of
the cycles ovulation occurred on the last day of maximal perineal tumescence with 26.9% of the ovulations occurring one day
after initial detumescence. In 17.8% ovulations occurred two to five days prior to detumescence while the remaining 17.8%
occurred two to three days following first observed detumescence. The mean progesterone level during the follicular phase
was significantly less than that in the luteal phase, 1.6 and 6.7 ng/ml respectively (p<0.01). The level of estrogen detected during the periods of maximal tumescence was significantly higher (p<0.05) than that detected in the remainder of the cycle, 19.8 and 5.9 pg/ml respectively. Vaginal smears were stained, observed
microscopically, and found to correlate with perineal swelling, hormone levels, and laparoscopic observations. |
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