title: Down syndrome. Seasonality and parity effects.
authors.forename: B
authors.initials: B
authors.lastname: Källén
authors.forename: A
authors.initials: A
authors.lastname: Måsbäck
mesh_terms: D004314:Down Syndrome / Q000453:epidemiology* / Q000235:genetics; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D010298:Parity; D011247:Pregnancy; D012621:Seasons