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.

There's a big learning curve when it comes to pregnancy. For many expecting parents, just thinking about contractions can be nerve-wracking because they are associated with pain and the start of labor ...

The contraction of smooth muscle is an essential process underpinning diverse physiological functions ranging from gastrointestinal motility to vascular regulation. At its core, smooth muscle ...

When your water breaks, it means the amniotic sac has ruptured. This typically signals the beginning of labor, but it may be several hours before you feel a contraction. Share on Pinterest Eloisa ...