title: Limited dependence of the human sex ratio on birth order and parental ages.
mesh_terms: D000328:Adult; D000367:Age Factors; D001722:Birth Order; D005260:Female; D006801:Humans; D008297:Male; D008423:Maternal Age; D008875:Middle Aged; D010290:Parents; D012744:Sex Ratio; D013223:Statistics as Topic