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Developing sperm (blue; artificially colored) fill the center of the seminiferous tubules (orange), which form the human testicle.Credit: Susumu Nishinaga/Scientific Photo Library A cutting-edge operation has restored a man’s ability to produce sperm by transplanting tissue samples that were removed from one of his testicles and frozen 16 years earlier, when he was still a
Despite the unclear picture regarding the causes of male infertility, unproven solutions are sold on social media. Naturopath Lucas is one of the health influencers whose content includes warnings about fertility rates. “We are seeing a global epidemic, a decline in fertility across the board,” he tells the BBC. But Lucas’ concern comes with some
Researchers are trying to produce human sperm (shown here in a colored electron microscope image) from stem cells in the laboratory.Credit: Juergen Berger/Scientific Photo Library It sounds like science fiction: collecting blood cells from a person, engineering them to eventually develop into immature sperm, and then incubating them in a small sac grown in a
Receive the daily Popular Science newsletter💡 Breakthroughs, discoveries and DIY tips delivered six days a week. By registering, you confirm that you are over 16 years of age, will receive newsletters and promotional content, agree to our Terms of Use, and acknowledge the data practices in our Privacy Policy. You can unsubscribe at any time.