WordNet
uterine contraction
n. a rhythmic tightening in labor of the upper uterine musculature that contracts the size of the uterus and pushes the fetus toward the birth canal
Wikipedia
Uterine contraction
A uterine contraction is a muscle contraction of the uterine smooth muscle.
Usage examples of "uterine contraction".
Six hours before the first uterine contraction, use the nul injector to introduce through the anterior abdominal wall into the amniotic fluid the calibrated dose of UNBLAF serum.