Researchers discovered a molecular timer that gets activated in the first days of pregnancy and influences when mice give ...

A normal pregnancy lasts about 40 weeks after the first day of the last period (38 weeks after fertilization). The danger of preterm labor is that it will lead to the birth of a baby that has not ...

A typical human pregnancy lasts 40 weeks, but most parents know this number is only a rough estimate. Babies are born on a seemingly unpredictable timeline, with a normal pregnancy ranging from 38 to ...