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- W2003582467 abstract "In captive Goeldi's monkeys, estrogen concentration was determined in fecal samples collected from 4 cycling/unmated females and 4 postpartum/mated females in order to ascertain the potential of fecal estrogen monitoring for providing basic information about reproductive status in this endangered Amazonian monkey. Subjects were fed an omnivorous diet and first-void feces were collected in the home cage at 1–3-day intervals for 30–50 days from the cycling females, and at 6–14-day intervals around the estimated time of the postpartum ovulation in each of the 4 mated females. Estimates for the duration of ovarian cycles (22–26 days) and the timing of ovulation were based on cyclic profiles of either blood progesterone or urinary pregnanediol-3α-glucuronide. Fecal estrogen values were normalized using these plasma or urinary profiles. HPLC analysis of estrogen from postpartum fecal samples demonstrated the presence of unconjugated estrone and estradiol-17β (“unconjugated estrogen”). Unconjugated estrogen was extracted and its fecal concentration estimated via EIA. The correlation (r) between plasma estrone conjugates and fecal unconjugated estrogen across nonconception ovarian cycles was 0.65 and measurement of the latter generated cyclic profiles. A range of 4–36-ng unconjugated estrogen g−1 feces was identified for follicular phases of nonconception cycles. Fecal unconjugated estrogen first exceeded the concentration range of the follicular phase 2–5 days after ovulation; the range was 49–402 ng g−1 feces in samples collected during the remainder of these nonconception luteal phases. Luteal phase concentrations were on average 10-fold higher than follicular phase concentrations. Each of the 4 mated females conceived at its postpartum ovulation; concentrations of fecal unconjugated estrogen excreted by 3 of these females demonstrated a marked postovulatory increase. This study demonstrates that fecal unconjugated estrogen can be applied to monitor ovarian cyclicity in Goeldi's monkey. © 1994 Wiley-Liss, Inc." @default.
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- W2003582467 date "1994-01-01" @default.
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- W2003582467 title "Monitoring fecal samples for estrogen excretion across the ovarian cycle in Goeldi's monkey (Callimico goeldii)" @default.
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- W2003582467 doi "https://doi.org/10.1002/zoo.1430130304" @default.
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