circulating placental [ human chorionic gonadotrophin ( hcg ) , schwangerschafts protein 1 ( sp1 ) , pregnancy-associated plasma protein a ( papp-a ) , decidual ( pregnancy protein 12 ( pp12 ) , and fetal alphafetoprotein ( afp ) ] proteins were measured immediately before and within 1 h in 18 women undergoing diagnostic chorionic villus sampling ( cvs ) in the first trimester .
C0032974
pregnancy protein
C0033684
proteins