Prenatal tests for anencephaly include: Blood tests: Tests may show high levels of alpha-fetoprotein, a protein produced by the immature liver cells of the fetus. read more
Anencephaly would result in an abnormal result on a blood or serum screening test or it might be seen during an ultrasound (which creates pictures of the body). For more information about screening and confirmatory tests during pregnancy, visit CDC’s birth defects diagnosis web page. read more