"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"@en-us . . "0"^^ . . . . . "0"^^ . . . "uterine contraction"^^ . . "00370458-n"^^ . . "100370458"^^ . . "uterine contraction"@en-us . "100353921"@en-us . .