title: A chiasma-hormonal hypothesis relating Down's syndrome and maternal age.
mesh_terms: D004314:Down Syndrome / Q000209:etiology* / Q000235:genetics; D005260:Female; D006801:Humans; D007986:Luteinizing Hormone / Q000378:metabolism*; D008423:Maternal Age; D008540:Meiosis; D010063:Ovum / Q000648:ultrastructure*; D011247:Pregnancy
chemical_list: D007986:Luteinizing Hormone