title: Influence of embryo quality and number of previous cycles on pregnancy and multiple pregnancy rates in women aged 35 to 37 years who received two or three embryos.
abstract: Women aged 35-37 years undergoing IVF-ET with fresh embryos at a university infertility center were analyzed to evaluate factors useful in determining whether two or three embryos should be transferred in this age group. Embryo quality and number, but not number of previous failed cycles, were important in determining outcome, and all triplet pregnancies could have been avoided at our program in this age group by limiting the transfer to two good-quality embryos, without reducing pregnancy rates.
authors.affiliation: The Center for Advanced Reproductive Services, Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, University of Connecticut Health Center, Farmington, Connecticut 06030-6224, USA.
authors.forename: David W
authors.initials: DW
authors.lastname: Schmidt
authors.forename: Lawrence L
authors.initials: LL
authors.lastname: Engmann
authors.forename: Linda J
authors.initials: LJ
authors.lastname: Siano
authors.forename: Claudio A
authors.initials: CA
authors.lastname: Benadiva
authors.forename: John C
authors.initials: JC
authors.lastname: Nulsen
authors.forename: Donald B
authors.initials: DB
authors.lastname: Maier
mesh_terms: D000328:Adult; D001755:Blastocyst; D004624:Embryo Transfer / Q000592:standards*; D005260:Female; D005307:Fertilization in Vitro / Q000379:methods* / Q000706:statistics & numerical data; D006801:Humans; D008423:Maternal Age; D011247:Pregnancy; D018873:Pregnancy Rate; D011272:Pregnancy, Multiple / Q000706:statistics & numerical data*; D012189:Retrospective Studies