title: Early diagnosis of pregnancy: a symposium.
mesh_terms: D000026:Abortion, Habitual / Q000378:metabolism; D006063:Chorionic Gonadotropin / Q000378:metabolism; D003937:Diagnosis, Differential; D005260:Female; D006729:Hormones, Ectopic / Q000378:metabolism; D006801:Humans; D007434:Intrauterine Devices; D007986:Luteinizing Hormone / Q000097:blood; D011247:Pregnancy; D011258:Pregnancy Tests / Q000379:methods*; D011259:Pregnancy Tests, Immunologic / Q000379:methods; D011261:Pregnancy Trimester, First; D011863:Radioimmunoassay
chemical_list: D006063:Chorionic Gonadotropin; D006729:Hormones, Ectopic; D007986:Luteinizing Hormone