title: Interpregnancy intervals, high maternal age and seasonal effects on the human sex ratio.
authors.affiliation: Galton Laboratory, University College London, Wolfson House, 4 Stephenson Way, London NW1 2HE, UK.
authors.forename: W H
authors.initials: WH
authors.lastname: James
mesh_terms: D005260:Female; D006801:Humans; D008297:Male; D008423:Maternal Age; D011247:Pregnancy; D018566:Pregnancy, High-Risk; D012621:Seasons; D012744:Sex Ratio; D013997:Time Factors