<prompt> AFP is raised in all except:Polycystic kidneyTrisomyIUDOesophageal atresia  <response>: As we have discussed earlier AFP levels are raised in :Under estimated gestational ageDecreased liqourDecreased birth weight of infant and decreased maternal weightIUDMultifetal pregnancy The amount of AFP entering the maternal circulation is proportional to the number of fetuses.Defects which permit more release of AFP into maternal serum Neural tube defects Abdominal wall defects :omphalocelegastroschisis Pilonidal cysts Congenital skin defectsMaternal causes: Preeclampsia Maternal hepatoma, teratoma, endodermal sinus tumorShaw 14e, p 380Placental causes: Chorioangioma of placenta Placenta accreta Abruptio placentae 