title: Human chorion scan of first trimester of pregnancy during administration of gestanon and syntolutan.
mesh_terms: D000328:Adult; D000500:Allylestrenol / Q000008:administration & dosage* / Q000627:therapeutic use; D002823:Chorion / Q000187:drug effects / Q000648:ultrastructure*; D004963:Estrenes / Q000008:administration & dosage*; D005321:Extraembryonic Membranes / Q000648:ultrastructure*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011374:Progesterone / Q000008:administration & dosage* / Q000009:adverse effects
chemical_list: D004963:Estrenes; D011374:Progesterone; D000500:Allylestrenol