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How Do Testicles Know When To Stop Making More Sperm?

Every time someone ejaculates, it produces millions of sperm. But the average pair of testicles produces billions of sperm cells over an entire lifetime. Why don’t they create all of their sperm in one go? Answer: Because testicles have a complicated process to avoid running out of sperm and endangering future fertility.

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Millennial Women are the Slowest to Have Babies of Any Generation in U.S. History

Millennial women are the slowest to have kids of any generation in U.S. history. But don’t blame increasingly popular fertility innovations like egg freezing. Career ambitions appear to play a lesser role in delaying parenthood than a sputtering economy, according to a new study from the Urban Institute.

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Controversial Fertility Treatments Focus On Eggs’ Power Plants

Derived from bacteria, mitochondria are our cells’ energy-producing powerhouses. Now, a Massachusetts company is convinced that these microscopic cylinders are also key to conceiving a baby, and it has persuaded several groups of physicians outside the United States to test that controversial premise in women with fertility problems.

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Pesticide Residue In Fruits And Vegetables Associated With Low Sperm Count

Consumption of fruits and vegetables that contain relatively large amounts of pesticide residue may affect men’s sperm counts and the number of normal-looking sperm they produce, a potential factor in fertility problems, Harvard University researchers reported Monday. The study by researchers at the T.H. Chan School of Public Health, described as the first to link pesticides in fruits and vegetables to reproductive problems, leaves many questions unanswered.