Comparative study of immunological and oral hormone withdrawal tests in early pregnancy.
D000906:Antibodies / Q000032:analysis; D006063:Chorionic Gonadotropin / Q000032:analysis; D004967:Estrogens; D005260:Female; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D007841:Latex Fixation Tests; D011247:Pregnancy; D011258:Pregnancy Tests; D011372:Progestins
D000906:Antibodies; D006063:Chorionic Gonadotropin; D004967:Estrogens; D011372:Progestins