title: The sex ratio in anencephaly.
mesh_terms: D000757:Anencephaly / Q000235:genetics*; D005111:Extrachromosomal Inheritance; D005260:Female; D006801:Humans; D008297:Male; D012730:Sex Chromosomes; D012744:Sex Ratio; D016135:Spinal Dysraphism / Q000235:genetics*