Which male fertility tests are best? If you and your partner are trying to conceive, knowing the overall health of your sperm is a helpful first step. Semen analysis can be done at a laboratory, but ...

Sperm have to wiggle vigorously to reach an egg, and that motion is key to a clever new fertility test. The technique, tested with bull semen and detailed in Advanced Materials Interfaces, harnesses ...

Ultrastructure expansion microscopy of murine male germ cells reveals the fine molecular structures of centrioles (shown in the enlarged image). DNA is stained in blue, and the chromosome axis in red.