misc. false pregnancy ; pseudogravidity
切除雌性的卵巢能顾避免了每年的妊娠，但在繁殖期，一些被切除卵巢的雌性仍然会表现出“假妊娠”的行为。
Spaying a female will eliminate the yearly gravid period, although some spayed females exhibit behavioral signs of "false pregnancies" during breeding season.
目的分析妊娠相关血浆蛋白a (PAPP - A)在产前筛查胎儿染色体病时的灵敏度和假阳性。
Objective To determine the sensitivity and false-positive rate of maternal serum pregnancy associated plasma protein a (PAPP-A) screening for abnormal fetal karyotype.
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