NATGEO | Health
Scientists don’t know what’s causing men’s fertility to decline. But there are clues.
科学家不知道是什么导致男性生育力下降，但有一些线索
Sperm reaches an egg. The science of male fertility remains a complex and complicated subject.
2026-03-02 2023词 晦涩
But on social media, experts’ measured approach to male fertility is unheeded, and the decline is a full-blown crisis with a range of causes. In truth, the science is far more complicated.
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