title: What are the rates and mechanisms of first and second trimester pregnancy loss in twins?
authors.affiliation: Northwestern University Medical School, Chicago, Illinois, USA.
authors.forename: W A
authors.initials: WA
authors.lastname: Grobman
authors.forename: A M
authors.initials: AM
authors.lastname: Peaceman
mesh_terms: D000022:Abortion, Spontaneous / Q000453:epidemiology* / Q000209:etiology / Q000517:prevention & control; D005260:Female; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D011272:Pregnancy, Multiple; D014427:Twins