Humans and most other organisms have internal biological clocks that track the daily cycle of sunrise and sunset. These ...

When does the circadian clock start ticking? A new study shows that fetal clocks synchronize to the mother in the womb via hormones, highlighting the importance of light and sleep during pregnancy.

In a new study published in the Journal of Biological Rhythms, researchers at Washington University in St. Louis reported that a mother helps to set the biological clock for her babies while they are ...