Biologists observe a molecular 'hand-off' that plays a key role in reproduction - Phys.org

Everyone considers sperm to be made exclusively by males. Well, it turns out that females also contribute to what makes a sperm a sperm.

Everyone considers sperm to be made exclusively by males. Well, it turns out that females also contribute to what makes a sperm a sperm. Nearly 20% of couples in the United States fail to conceive n… [+4042 chars]

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