Document Detail

Live-birth rates and multiple-birth risk of assisted reproductive technology pregnancies conceived using thawed embryos, USA 1999-2000.
MedLine Citation:
PMID:  12832370     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Increasing use of assisted reproductive technology treatments has been associated with the current rise in multiple births in the USA. Embryo cryopreservation and subsequent thawed embryo transfer may favourably impact the multiple-birth risk by relieving some pressure that patients and providers may feel to transfer several embryos in a single cycle. The study objective was to examine both live-birth rates and multiple-birth risk in thawed cycles. METHODS: The authors used a population-based sample of 21 555 assisted reproductive technology procedures performed in US clinics in 1999 and 2000 that used thawed embryos derived from the patient's oocytes. RESULTS: Both patient age and the number of embryos transferred were independent predictors of live birth. Even among women aged 20-29 years, the transfer of three embryos resulted in an increase in the live-birth rate compared with cycles in which one or two embryos were transferred. This increase in success was accompanied by an increased multiple-birth risk. In all age groups up to 40 years, the transfer of just two embryos resulted in a multiple-birth risk of 16-17%. The multiple-birth risk increased with the number of embryos transferred. CONCLUSIONS: Patient age and the number of embryos transferred significantly affect live-birth and multiple-birth rates among women who use thawed embryos.
Anjel Vahratian; Laura A Schieve; Meredith A Reynolds; Gary Jeng
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, P.H.S.    
Journal Detail:
Title:  Human reproduction (Oxford, England)     Volume:  18     ISSN:  0268-1161     ISO Abbreviation:  Hum. Reprod.     Publication Date:  2003 Jul 
Date Detail:
Created Date:  2003-06-30     Completed Date:  2004-03-08     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8701199     Medline TA:  Hum Reprod     Country:  England    
Other Details:
Languages:  eng     Pagination:  1442-8     Citation Subset:  IM    
Division of Reproductive Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia, USA.
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Age Distribution
Embryo Transfer / statistics & numerical data*
Fertilization in Vitro / statistics & numerical data*
Infant, Newborn
Multiple Birth Offspring / statistics & numerical data*
Multivariate Analysis
Pregnancy Rate*
Risk Factors
United States / epidemiology

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Pregnancy outcome in women with PCOS and in controls matched by age and weight.
Next Document:  Impact of elective single embryo transfer on the twin pregnancy rate.