The more we investigate the female reproductive tract, the more ownership a female gains over her fertilization rights, and the more ridiculous the idea of an all-important ‘sperm race’ becomes. It turns out that mammalian sperm aren’t even capable of fulfilling their biological function without female intervention. They can’t actually fuse with the ova without a period of activation known as capacitation. This is under female control and involves chemical alterations of the sperm, probably involving uterine secretions. But guess what? We don’t know much more because it’s not really been
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