Next-generation male contraceptives could rely on the perfect temperature

Next-generation male contraceptives could rely on the perfect temperature

Sperm are somewhat like Goldilocks in their quest for everything to be just right. At least in mammals, the male sex cells are surprisingly picky about temperature and it can’t be too hot or too cold for them to do their thing. Sperm thrives in conditions only a few degrees cooler than normal body temperature. But they must endure warmer temperatures in the female reproductive tract in order to fulfill their destiny and fertilize an egg. But how…