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.

During the first weeks of pregnancy, the developing placenta in a mother's womb undergoes a dramatic change. Individual cells merge, forming a continuous barrier that will spend the next nine months ...

Artificial wombs are recreating pregnancy outside the body, keeping premature life developing in controlled environments.