COLUMBIA, Mo. -- Scientists have struggled to fully understand how male sperm cells function and why they sometimes fail to fertilize female eggs, which has implications for both livestock farmers ...

A "pill for men" may be a long way down the road, but a new fundamental knowledge of how sperm acquire the ability to fertilize an egg, letting scientists either block or enhance the process, is at ...

Researchers have found the first direct evidence that chemicals in the environment - including some in foods such as peas and beer - mimic the effect of the female sex hormone estrogen on the ability ...

In a potential advance toward a male contraceptive pill and new treatments for infertility, researchers are reporting the identification of key biochemical changes that put sperm "in the mood" for ...

Women's contraceptive woes will soon be history as an American researcher is working on a new contraceptive, which will be a male version of the birth control pill. An American researcher has for the ...

2 new papers from reproductive biologists at UMass Amherst report advances in understanding the basic processes of sperm capacitation that may one day improve IVF success by bypassing early problems, ...