Sib risk of anencephaly and spina bifida in British Columbia.
D000757:Anencephaly / Q000235:genetics*; D001955:British Columbia; D005260:Female; D005817:Genetic Counseling; D006801:Humans; D007231:Infant, Newborn; D008131:London; D008297:Male; D012008:Recurrence; D012306:Risk; D016136:Spina Bifida Occulta / Q000235:genetics*