title: Fertility treatments and multiple births in the United States.
authors.forename: Nikolaos
authors.initials: N
authors.lastname: Vlachadis
authors.forename: Nikolaos
authors.initials: N
authors.lastname: Vrachnis
authors.forename: Emmanouel
authors.initials: E
authors.lastname: Economou
mesh_terms: D005260:Female; D006801:Humans; D009099:Multiple Birth Offspring / Q000706:statistics & numerical data*; D011247:Pregnancy; D027724:Reproductive Techniques, Assisted