Induction of pseudopregnancy in the American Black Bear (Ursus americanus).
Induction of pseudopregnancy in the American Black Bear (Ursus americanus).
复制标题
美洲黑熊（Ursus americanus）的假妊娠诱导。
DOI：
10.1002/jez.a.10269
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发表时间：
2003
期刊：
影响因子：
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通讯作者：
Bahr,JaniceM
中科院分区：
文献类型：
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作者：
Schulz,LauraClamon;Nelson,RalphA;Pyter,LeahM;Bahr,JaniceM
The aim of this study was to determine whether American Black Bears (Ursus americanus) can experience a pseudopregnancy of the same duration as pregnancy. To do this, we treated three nonmated, captive female bears with human chorionic gonadotropin (hCG) during one breeding season, and saline during another. Progesterone concentrations were measured in monthly blood samples to determine whether pseudopregnancy had occurred. Elevated progesterone concentrations were observed in two out of three bears treated with hCG. We conclude that 1) Elevated progesterone concentrations can be induced in black bears by injection of 35 U/kg hCG during the mating season. 2) Bears can experience a pseudopregnancy, identical in length to pregnancy, in which progesterone profiles are indistinguishable from those of pregnancy.J. Exp. Zool. 162–166, 2003. © 2003 Wiley‐Liss, Inc.
