title: Bleeding in early pregnancy investigated by ultrasound, plasma progesterone and oestradiol.
mesh_terms: D000033:Abortion, Threatened / Q000097:blood / Q000175:diagnosis*; D003338:Corpus Luteum; D004958:Estradiol / Q000097:blood*; D005260:Female; D005318:Fetal Heart; D005500:Follow-Up Studies; D006801:Humans; D007106:Immune Sera; D008598:Menstruation; D010060:Ovulation; D011247:Pregnancy; D011272:Pregnancy, Multiple; D011374:Progesterone / Q000097:blood*; D011379:Prognosis; D011863:Radioimmunoassay; D012710:Serum Albumin, Bovine; D013997:Time Factors; D014427:Twins; D014463:Ultrasonography
chemical_list: D007106:Immune Sera; D012710:Serum Albumin, Bovine; D011374:Progesterone; D004958:Estradiol