Prozone phenomenon in the direct agglutination test for pregnancy.
D000372:Agglutination Tests; D006063:Chorionic Gonadotropin / Q000652:urine; D005188:False Negative Reactions; D005189:False Positive Reactions; D005260:Female; D005865:Gestational Age; D006801:Humans; D006828:Hydatidiform Mole / Q000652:urine; D011247:Pregnancy; D011258:Pregnancy Tests
D006063:Chorionic Gonadotropin