On the precision of chorionic gonadotrophin assays.
D001681:Biological Assay; D002823:Chorion; D006063:Chorionic Gonadotropin / Q000032:analysis*; D006062:Gonadotropins; D006801:Humans
D006063:Chorionic Gonadotropin; D006062:Gonadotropins
GONADOTROPINS, CHORIONIC/determination