title: Risk of closed lesions in sibs of cases of open neural tube defect.
mesh_terms: D000757:Anencephaly / Q000235:genetics*; D005260:Female; D005817:Genetic Counseling; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011296:Prenatal Diagnosis; D012306:Risk; D016136:Spina Bifida Occulta / Q000235:genetics*