title: Periconceptual parental smoking and sex ratio of offspring.
authors.forename: Gabriel M
authors.initials: GM
authors.lastname: Leung
authors.forename: Lai Ming
authors.initials: LM
authors.lastname: Ho
authors.forename: Tai Hing
authors.initials: TH
authors.lastname: Lam
mesh_terms: D005260:Female; D005306:Fertilization; D006801:Humans; D008297:Male; D018811:Maternal Exposure; D018812:Paternal Exposure; D012744:Sex Ratio; D012907:Smoking