Effects of progesterone (P₄) and mifepristone (RU 486) on binding
of oxytocin (OT) to its ovine uterine receptor (OTR) were studied in two
experiments. Two additional experiments were conducted to evaluate
specific binding sites for P4 in endometrial plasma membranes. In Exp.
1, ovariectomized ewes were injected with estradiol-17β (E₂)...