title: Isometric contractions of isolated rat uterine muscle: relation to estrous cycle and pregnancy.
mesh_terms: D000704:Analysis of Variance; D000818:Animals; D004558:Electric Stimulation; D004967:Estrogens / Q000502:physiology; D004971:Estrus; D005260:Female; D066298:In Vitro Techniques; D009119:Muscle Contraction; D009129:Muscle Tonus; D011247:Pregnancy; D011374:Progesterone / Q000502:physiology; D051381:Rats; D013997:Time Factors; D014599:Uterus / Q000502:physiology*
chemical_list: D004967:Estrogens; D011374:Progesterone