passive length-tension curves of uterine strips obtained on day 20 of pregnancy from ovariectomized , progesterone-treated ( ovx-p ) , progesterone + estrogen-treated ( ovx-pe ) , and intact pregnant rats ( control ) were determined , and the effects of ovarian hormones on the length of the collagenous framework ( lz ) , tension at in vivo length ( tv ) , and distensibility ( d ) of the strips , which were obtained from the curves , were evaluated .
C0032961
pregnancy
C0033308
progesterone