title: Time to pregnancy and sex of offspring: cohort study.
authors.affiliation: Maastricht University, Department of Epidemiology, PO Box 616, 6200 MD Maastricht, Netherlands. luc.smits@epid.unimaas.nl
authors.forename: Luc J M
authors.initials: LJ
authors.lastname: Smits
authors.forename: Rob A
authors.initials: RA
authors.lastname: de Bie
authors.forename: Gerard G
authors.initials: GG
authors.lastname: Essed
authors.forename: Piet A
authors.initials: PA
authors.lastname: van den Brandt
mesh_terms: D000328:Adult; D015331:Cohort Studies; D005260:Female; D006801:Humans; D008297:Male; D008423:Maternal Age; D009426:Netherlands; D011247:Pregnancy / Q000706:statistics & numerical data*; D012744:Sex Ratio; D013997:Time Factors