title: The ultrastructure of endometrial cups in pregnant mares.
abstract: Electron microscopy and immunofluorescence techniques were used to study the various epithelial cells in the endometrial cups of ten pregnant mares, and in the uterine epithelium of one non-pregnant mare. Evidence was obtained which suggested that epithelial gland cells within the endometrial cups, as distinct from the hypertrophied decidual-like cells in the cup, may synthesize PMSG. The suggestion does not agree with the findings of other workers in the fetal origin (chorionic girdle cells) of this gonadotrophin.
mesh_terms: D000818:Animals; D003593:Cytoplasm / Q000648:ultrastructure; D003656:Decidua / Q000648:ultrastructure; D004717:Endometrium / Q000032:analysis / Q000648:ultrastructure*; D004721:Endoplasmic Reticulum / Q000648:ultrastructure; D005260:Female; D006003:Glycogen / Q000032:analysis; D006064:Gonadotropins, Equine / Q000276:immunology; D006736:Horses / Q000033:anatomy & histology*; D008854:Microscopy, Electron; D011247:Pregnancy; D011270:Pregnancy, Animal; D012728:Sex Chromatin / Q000032:analysis
chemical_list: D006064:Gonadotropins, Equine; D006003:Glycogen