title: Comparison of successive pregnancies provides evidence for a maternal component in determining circulating steroid concentrations.
mesh_terms: D004964:Estriol / Q000097:blood; D005260:Female; D005865:Gestational Age; D006801:Humans; D010298:Parity; D011247:Pregnancy / Q000097:blood*; D011374:Progesterone / Q000097:blood; D013256:Steroids / Q000097:blood*
chemical_list: D013256:Steroids; D011374:Progesterone; D004964:Estriol