Incidence of anencephalus, spina bifida, and hydrocephalus related to birth rank and maternal age.
D009008:Abnormalities, Severe Teratoid; D000757:Anencephaly; D005190:Family; D005260:Female; D006801:Humans; D006849:Hydrocephalus / Q000706:statistics & numerical data*; D015994:Incidence; D008423:Maternal Age; D009035:Mothers; D036801:Parturition; D016135:Spinal Dysraphism
FAMILY; HYDROCEPHALUS/statistics; MATERNITY; MONSTERS; SPINA BIFIDA