title: Early loss rates of entire pregnancies after assisted reproduction are lower in twin than in singleton pregnancies.
abstract: Case-control studies on plurality dependent spontaneous embryonic loss rates after assisted reproduction found that twin pregnancies have a two to five times lower miscarriage rate of the entire pregnancy compared with singletons.
authors.affiliation: Department of Obstetrics and Gynecology, S. João University Hospital, Porto, Portugal.
authors.forename: Alexandra
authors.initials: A
authors.lastname: Matias
authors.forename: Giovanni B
authors.initials: GB
authors.lastname: La Sala
authors.forename: Isaac
authors.initials: I
authors.lastname: Blickstein
mesh_terms: D000022:Abortion, Spontaneous / Q000453:epidemiology / Q000209:etiology*; D016022:Case-Control Studies; D005260:Female; D006801:Humans; D011247:Pregnancy; D011256:Pregnancy Outcome / Q000453:epidemiology; D011272:Pregnancy, Multiple; D027724:Reproductive Techniques, Assisted / Q000009:adverse effects*; D013997:Time Factors; D014427:Twins