Serum hCG and endometrial histology in early pregnancy.
D000028:Abortion, Induced; D006063:Chorionic Gonadotropin / Q000097:blood*; D004717:Endometrium / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D011247:Pregnancy
D006063:Chorionic Gonadotropin