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