Female egg donors are to be recruited by researchers for stem cell experiments for the first time.

研究人员首次招募女性捐卵者进行干细胞实验研究。

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Each female will lay just one egg in April or May.

每只雌性在4月或5月份将只产一颗卵。

《柯林斯英汉双解大词典》

Adding yolk to a little egg of the lizard was a recipe for a female.

往小蜥蜴卵中添加卵黄便孵出了雌性蜥蜴。

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Earlier research suggests that circulating levels of a potent stress hormone, corticosterone, in the female before conception or egg laying is a dominant factor.

MSN: Boy or girl? Moms have biggest say - Technology & science - Science - DiscoveryNews.com | NBC News

An osprey thought to be the UK's oldest breeding female has laid her first egg of the season.

BBC: Perthshire osprey 'Lady' lays first egg of season

An osprey which is thought to be the UK's oldest breeding female has laid her 62nd egg at a Perthshire reserve.

BBC: 'Oldest' breeding osprey lays 62nd egg at Loch of the Lowes