At-home pregnancy tests promise 99 percent accuracy. But the best time to take a pregnancy test and get the most exact result depends on when you conceive.

Implantation bleeding can last anywhere from a few hours to several days. It’s usually light and short, and typically occurs 10 to 14 days after conception. Learn more.

Researchers at deCODE genetics have developed a groundbreaking DNA map, revealing the intricate process of genetic recombination during reproduction. This map highlights areas of DNA that undergo ...

Is there only one optimal configuration an organism can reach during evolution? Is there a single formula that describes the trajectory towards the optimum? And can we 'derive' it in a purely ...

House G.O.P. Floats Medicaid Cuts and More to Finance Trump’s Huge Agenda President Trump wants a massive tax cut and immigration crackdown bill. Republicans must decide what to cut to help pay ...