title: Control of human sex ratios. Gender distribution--not sex selection.
authors.affiliation: Faulkner Centre For Reproductive Medicine, Boston, MA 02130.
authors.forename: M M
authors.initials: MM
authors.lastname: Seibel
authors.forename: S G
authors.initials: SG
authors.lastname: Seibel
authors.forename: M
authors.initials: M
authors.lastname: Zilberstein
mesh_terms: D004624:Embryo Transfer; D004989:Ethics; D005260:Female; D006801:Humans; D008297:Male; D012732:Sex Determination Analysis; D012743:Sex Preselection; D012744:Sex Ratio