title: Plasma progesterone concentrations after administration via intravaginal rings.
mesh_terms: D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D011374:Progesterone / Q000008:administration & dosage* / Q000097:blood; D013488:Suppositories; D014621:Vagina
chemical_list: D013488:Suppositories; D011374:Progesterone