Early diagnosis of pregnancy. An invitational symposium.
D000014:Abnormalities, Drug-Induced / Q000517:prevention & control; D000026:Abortion, Habitual / Q000517:prevention & control; D000032:Abortion, Therapeutic; D000328:Adult; D003376:Counseling; D005260:Female; D005315:Fetal Diseases / Q000517:prevention & control; D005333:Fetus / Q000187:drug effects / Q000528:radiation effects; D006385:Hemagglutination Inhibition Tests; D006801:Humans; D008722:Methods; D011247:Pregnancy; D011258:Pregnancy Tests; D011259:Pregnancy Tests, Immunologic; D011832:Radiation Injuries / Q000517:prevention & control; D013997:Time Factors