What are the research priorities for improving our understanding of male fertility and developing new contraceptives?

Apr 19, 2006 ... 198 complete and partial foraging dives made by 37 individual sperm whales in the Atlantic Ocean, the Gulf of Mexico and the Ligurian Sea. Sep 6, 2023 ... ... sperm, eggs or a womb. The Weizmann Institute team say their "embryo model", made using stem cells, looks like a textbook example of a real ... PSA is an enzyme present in male semen that helps sperm motility. In addition, female ejaculate usually contains fructose, a form of sugar. Fructose is also ... 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 ... ... produced when the sperm fertilized the egg. This cell contained all the information to create an adult made of trillions of cells. Most of these adult cells ... Oct 19, 2023 ... Pedro Huertas, 69, of Pasadena, California, pleaded guilty to a misdemeanor charge of unlawfully importing wildlife parts (carvings from sperm whale teeth and ... 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 ... Sep 25, 2021 ... George had had a vasectomy long before Catherine was born. She and her brother had been donor conceived in Harley Street using the sperm of two ... Jan 10, 2017 ... The sperm is contained in a white fluid called seminal fluid that's released by the prostate glands and seminal vesicles. Semen is a combination of both this ... Sep 22, 2021 ... Mouse pluripotent stem cells can differentiate into functional sperm. These sperm were successfully used to produce healthy, fertile offspring.