title: A study of the first degree relatives of the parents of spina bifida children.
mesh_terms: D000328:Adult; D000757:Anencephaly / Q000453:epidemiology / Q000235:genetics; D005260:Female; D005808:Genes, Recessive; D006801:Humans; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy; D011248:Pregnancy Complications; D011336:Probability; D012008:Recurrence; D012494:Sampling Studies; D012737:Sex Factors; D016135:Spinal Dysraphism / Q000453:epidemiology / Q000235:genetics*