title: Background pregnancy rates in an infertile population.
abstract: The objective of this cohort study was to determine the true spontaneous background pregnancy rate in an infertile population. A total of 9079 treatment months in infertile couples with infertility of a least 1 year's duration were recorded in a medical school affiliated infertility setting. Results indicated that the spontaneous clinical pregnancy rate in an infertile population was 2. 02% per inactive treatment month, resulting in a cumulative rate after 12 months of 19.9%. It was concluded that couples with a history of infertility have a low but significant background pregnancy rate, which needs to be considered alongside the effectiveness of various treatment modalities.
authors.affiliation: Center for Human Reproduction and the Foundation for Reproductive Medicine and Blue Cross Blue Shield of Illinois, Chicago, IL, USA.
authors.forename: N
authors.initials: N
authors.lastname: Gleicher
authors.forename: B
authors.initials: B
authors.lastname: VanderLaan
authors.forename: D
authors.initials: D
authors.lastname: Pratt
authors.forename: V
authors.initials: V
authors.lastname: Karande
mesh_terms: D015331:Cohort Studies; D005260:Female; D006801:Humans; D007246:Infertility / Q000628:therapy; D008297:Male; D011247:Pregnancy; D018873:Pregnancy Rate