title: Sex preselection in the United States: some implications.
mesh_terms: D001290:Attitude; D001722:Birth Order; D005191:Family Characteristics; D005193:Family Planning Services; D005260:Female; D006801:Humans; D008297:Male; D010298:Parity; D012732:Sex Determination Analysis; D012744:Sex Ratio; D014481:United States