title: Fertility treatments and multiple births in the United States.
authors.forename: Norbert
authors.initials: N
authors.lastname: Gleicher
authors.forename: Vitaly A
authors.initials: VA
authors.lastname: Kushnir
authors.forename: David
authors.initials: D
authors.lastname: Barad
mesh_terms: D005260:Female; D006801:Humans; D009099:Multiple Birth Offspring / Q000706:statistics & numerical data*; D011247:Pregnancy; D027724:Reproductive Techniques, Assisted