Contractions are when the muscles of your uterus tighten and relax to get ready for childbirth. These muscles help push your baby down the birth canal. Once you reach week 37 of your pregnancy, it ...

Dry heaving, or retching, is a sensation involving gagging and forceful, vomiting-like contractions. Older adults may experience dry heaving for various reasons. Dry heaving differs from vomiting in ...