title: What is the most relevant standard of success in assisted reproduction? Is BESST (birth emphasizing a successful singleton at term) truly the best?
abstract: There is much variability and no consensus on the definition of the most relevant outcome parameter after assisted reproduction technology (ART). Descriptive reports, such as annual statistics from national registries on the success of ART programmes, should present treatment success in terms of live birth per ovarian stimulation started, as this is the most relevant information for patients and doctors alike. Addressing concerns about the high rate of multiple pregnancies, rescaling the outcome of ART in large programmes and national audits to the singleton, live birth, might trigger a global change of attitude towards elective single embryo transfer in addition to any legal restrictions imposed. For clinical studies, the outcome measure will depend on the hypothesis tested, and investigators should remain free to choose the appropriate primary outcome measure.
authors.affiliation: Department of Obstetrics and Gynecology, Medical University of Schleswig-Holstein, Campus Luebeck, Ratzeburger Allee 160, D-23538 Luebeck, Germany. georg.griesinger@frauenklinik.uni-luebeck.de
authors.forename: Georg
authors.initials: G
authors.lastname: Griesinger
authors.forename: Konstantinos
authors.initials: K
authors.lastname: Dafopoulos
authors.forename: Askan
authors.initials: A
authors.lastname: Schultze-Mosgau
authors.forename: Ricardo
authors.initials: R
authors.lastname: Felberbaum
authors.forename: Klaus
authors.initials: K
authors.lastname: Diedrich
mesh_terms: D004624:Embryo Transfer; D005307:Fertilization in Vitro; D006304:Health Status; D006801:Humans; D007231:Infant, Newborn; D017063:Outcome Assessment, Health Care; D027724:Reproductive Techniques, Assisted / Q000592:standards*; D047929:Term Birth