What are the challenges in translating basic research findings into effective male contraceptives?

Ambergris is made by sperm whales and has been used by people for centuries. Find out what it is made from, how it ends up in the ocean and whether we still ... Of the 40 to 300 hundred million sperm produced by the male, only one gets to do its job. Where do the other sperm go? Once sperm cells reach the end of the ... A vasectomy works by permanently blocking the exit flow of sperm from the testicle. Because the ejaculate is primarily composed of fluid (semen), there is ... Last year, a piece of news from France, which reported that the transformation of stem cells into sperm cells with a developed tail structure had been achieved ... Feb 28, 2023 ... Men produce several million sperm per day—about 1,000 per second. To prevent pregnancy, all of these need to be stopped from reaching an egg. Sperm is the male reproductive cell. It consists of a head, a midpiece, and a tail. Mature sperm cells measure ~0.05 millimetres and swim at around 3 ... Apr 7, 2022 ... Rat sperm cells derived from stem cells in the lab were used to fertilise eggs and produce healthy offspring for the first time in a procedure that could be ... Jun 24, 2022 ... A vasectomy is a permanent form of male birth control. It blocks sperm from getting into the fluid that leaves the penis during ejaculation. A work made of chromogenic print. Approximately 17 of 41 Sperm Whales Which Beached and Subsequently Died, Florence, Oregon, from the series “American ... Semen then travels through the urethra and out of the penis. Male fertility depends on your body being able to make and deliver normal sperm. The sperm go into ...