Spina bifida occulta in the parents of offspring with neural tube defects.
D000757:Anencephaly / Q000453:epidemiology; D002490:Central Nervous System / Q000002:abnormalities; D000013:Congenital Abnormalities / Q000453:epidemiology; D004677:Encephalocele / Q000453:epidemiology; D005260:Female; D005817:Genetic Counseling; D006801:Humans; D008159:Lumbar Vertebrae / Q000002:abnormalities; D008297:Male; D009520:New Zealand; D012445:Sacrococcygeal Region / Q000002:abnormalities; D016135:Spinal Dysraphism / Q000453:epidemiology / Q000235:genetics*