title: [Incidence of single and multiple births following in vitro fertilization].
mesh_terms: D005260:Female; D005307:Fertilization in Vitro; D006801:Humans; D011247:Pregnancy; D011272:Pregnancy, Multiple; D012306:Risk
vernacular_title: Die Häufigkeit von Einlings- und Mehrlingsgeburten nach In-vitro-Befruchtung.