title: Maternal age and altered embryonic selection: a reply to Carothers and to Warburton, Stein, and Kline.
mesh_terms: D000328:Adult; D000782:Aneuploidy; D004314:Down Syndrome; D005260:Female; D006801:Humans; D008423:Maternal Age; D011247:Pregnancy; D012729:Sex Chromosome Aberrations