title: Fetal gender and fetal growth retardation: fact or artifact?
authors.forename: J
authors.initials: J
authors.lastname: Zhang
mesh_terms: D005260:Female; D005317:Fetal Growth Retardation / Q000453:epidemiology*; D006801:Humans; D008297:Male; D011247:Pregnancy; D015983:Selection Bias; D012727:Sex Characteristics