Urinary steroid evaluations to monitor ovarian function in exotic ungulates: II. Comparison between the giraffe (Giraffa camelopardalis) and the Okapi (Okapia johnstoni)
Urinary steroid evaluations to monitor ovarian function in exotic ungulates: II. Comparison between the giraffe (Giraffa camelopardalis) and the Okapi (Okapia johnstoni)
复制标题
用于监测外来有蹄类动物卵巢功能的尿类固醇评估：II。
DOI：
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发表时间：
1986
期刊：
影响因子：
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通讯作者：
B. Lasley
中科院分区：
文献类型：
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作者：
N. Loskutoff;L. Walker;J. Ott‐Joslin;B. Raphael;B. Lasley
在雌性长颈鹿卵巢活性评估期间，卵巢不育周期和妊娠末期。以孕二醇-3-葡萄糖醛酸盐（PdG）形式的孕酮代谢物，在每天随机收集的4只成年分娩长颈鹿的尿液样本中进行了测量。卵泡期平均长度为4.0±0.1天（N = 12，范围为3-5天），排卵期峰值PdG水平平均为30.9±1.7 ng/mg Cr （N = 12）。妊娠后半期的PdG水平大大超过黄体期的平均水平，这与家养反刍动物的情况相反。在分娩前，PdG排泄明显下降，这可能有助于预测这一事件。这些数据有助于阐明成熟雌性长颈鹿的卵巢功能，并提供有关某些卵巢异常结构的生理作用的信息。此外，观察到在长颈鹿和霍加狓的非受精周期中PdG排泄模式的相似性表明类似的潜在生理过程。
Ovarian activity in the female giraffe was evaluated during the nonfertile ovarian cycle and during the terminal stages of gestation. Progesterone metabolites, in the form of pregnanediol-3-glucuronide (PdG), were measured in daily random urine samples collected from four adult parous giraffes. The follicular phase averaged 4.0 ± 0.1 days in length (N = 12; range 3–5 days) and peak PdG levels in the postovulatory period averaged 30.9 ± 1.7 ng/mg Cr (N = 12). PdG levels during the latter half of gestation greatly exceeded average luteal phase levels, which is in contrast to domestic ruminants. Prior to parturition, a marked decline in PdG excretion was evident, which may be useful for anticipating this event. These data serve to elucidate ovarian function in the mature female giraffe and to provide information concerning the physiologic role of certain anomalous ovarian structures. In addition, observed similarities in the pattern of PdG excretion during the nonfertile cycles of the giraffe and the okapi indicate similar underlying physiologic processes.