title: Steroid hormone control of myometrial contractility and parturition.
abstract: The precise temporal control of uterine contractility is essential for the success of pregnancy. For most of pregnancy, progesterone acting through genomic and non-genomic mechanisms promotes myometrial relaxation. At parturition the relaxatory actions of progesterone are nullified and the combined stimulatory actions of estrogens and other factors such as myometrial distention and immune/inflammatory cytokines, transform the myometrium to a highly contractile and excitable state leading to labor and delivery. This review addresses current understanding of how progesterone and estrogens affect the contractility of the pregnancy myometrium and how their actions are coordinated and controlled as part of the parturition cascade.
authors.affiliation: Department of Reproductive Biology, Case Western Reserve University, 11100 Euclid Avenue, Cleveland, OH 44106-5034, United States. sam.mesiano@case.edu
authors.forename: Sam
authors.initials: S
authors.lastname: Mesiano
authors.forename: Toni N
authors.initials: TN
authors.lastname: Welsh
mesh_terms: D000818:Animals; D004967:Estrogens / Q000378:metabolism*; D005260:Female; D015870:Gene Expression; D006801:Humans; D009215:Myometrium / Q000502:physiology*; D036801:Parturition; D011374:Progesterone / Q000378:metabolism*; D011980:Receptors, Progesterone / Q000378:metabolism; D014590:Uterine Contraction
chemical_list: D004967:Estrogens; D011980:Receptors, Progesterone; D011374:Progesterone