#uterine_contraction__uterinecontraction  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
  supertype:  muscular_contraction__contraction  (physiology) a shortening or tensing of a part or organ (especially of a muscle or muscle fiber)
  part of:  parturiency__labor__labour__confinement__lyingin__travail__childbed  concluding state of pregnancy; from the onset of labor to the birth of a child; "she was in labor for six hours"
     part of:  pregnancy__gestation  the state of being pregnant; the period from conception to birth when a woman carries a developing fetus in her uterus

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