关键词：好孕当头 好孕 37 绝经 卵子 当头 胚胎
It seems simple: an egg + sperm = one embryo. But if your sperm is "few, vague and abnormal&quoIt seems simple: an egg + sperm = one embryo. But if your sperm is "few, vague and abnormal" and your woman is premenopausal at age 37, things start to get complicated.
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