title: The choice for sons or daughters.
authors.forename: Frank
authors.initials: F
authors.lastname: Van Balen
mesh_terms: D002755:Choice Behavior; D005260:Female; D005434:Flow Cytometry / Q000379:methods; D006801:Humans; D008297:Male; D009679:Nuclear Family; D011247:Pregnancy; D012743:Sex Preselection / Q000379:methods*