91色情片
First viable sperm cells grown from scratch
For the first time viable mouse sperm have been grown outside the testes. If this works for human sperm, it could mean new treatments for infertile men
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Earth
Polygamy boosts mouse sperm fitness
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91色情片
Painkillers in pregnancy can affect fetal testicles
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91色情片
Zap testes with ultrasound for temporary ‘vasectomy’
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Life
Men with younger women have more children
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Humans
High-protein diet, low fertility?
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Humans
Narcotic khat gets sperm going
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Humans
Cancer drugs tame rogue womb cells
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Humans
The great escape
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