title: [Hormonal requirements for blastocyst implantation].
abstract: In the early stages of pregnancy, embryo development and preparation of the endometrium must be synchronized in a very precise manner, in order to let blastocyst establishment. This state results from the interactions of steroid hormones, progesterone and/or estrogens. The hormonal requirements for embryo implantation vary considerably among different mammals. Systemic progesterone intervention is common to the various species; however, the requirement for ovarian estrogen seems not to be. In this paper, certain new aspects of the hormonal requirements for blastocyst implantation are reviewed.
authors.affiliation: División de Biología de la Reproducción, Unidad de Investigación Biomédica, Centro Médico Nacional Siglo XXI, México, D.F.
authors.forename: M C
authors.initials: MC
authors.lastname: Loza Arredondo
mesh_terms: D000818:Animals; D001755:Blastocyst / Q000502:physiology*; D003656:Decidua / Q000502:physiology; D010064:Embryo Implantation; D004967:Estrogens / Q000145:classification / Q000502:physiology*; D005260:Female; D006801:Humans; D008322:Mammals / Q000196:embryology*; D011247:Pregnancy; D011374:Progesterone / Q000502:physiology*; D013045:Species Specificity
chemical_list: D004967:Estrogens; D011374:Progesterone
vernacular_title: Requerimientos hormonales para la implantación del blastocisto.