Pregnancy opens a whole new slew of questions about what's "normal." For many moms, one common query is, what do Braxton-Hicks feel like? Also known as practice contractions, it's easy to confuse ...

Muscle contraction is the tightening, shortening, or lengthening of muscles when you do some activity. It can happen when you hold or pick up something, or when you stretch or exercise with weights.

The placenta contracts independently of the rest of the uterine wall, as seen in around 60% of 36 MRI-scanned healthy ...

Childbirth depends not just on hormones, but on the uterus’s ability to sense physical force. Scientists found that pressure and stretch sensors in uterine muscles and surrounding nerves work together ...