Document Detail

Reducing the number of embryos transferred in Sweden-impact on delivery and multiple birth rates.
MedLine Citation:
PMID:  17562674     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Reduction of the number of embryos transferred has been introduced to decrease the multiple birth rates (MBRs) after IVF and the associated risks for the children. The aim of this report is to present the effect of two steps in reduction of the number of embryos transferred, when applied in the majority of the patients, on national data for delivery and MBR after IVF in Sweden. METHODS: This observational study is based on annual reports from all IVF clinics in Sweden to the National Board of Health and Welfare for the time period 1991-2004. RESULTS: The main finding is that despite a successive reduction in the number of embryos transferred, delivery rates were maintained at around 26% while MBR decreased dramatically, from about 35% to around 5%. The same pattern was noticed, independent of age, for all women below 40. In comparison with the USA, lower delivery and MBR were noted for Sweden whereas a higher 'birth per embryo transferred' was found. CONCLUSIONS: Single embryo transfer (SET) results in satisfactory delivery rates and a dramatic decrease in the MBRs, also when applied on a broad scale. The experience from Sweden ought to encourage other countries to introduce SET more widely.
P O Karlström; C Bergh
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Publication Detail:
Type:  Journal Article     Date:  2007-06-11
Journal Detail:
Title:  Human reproduction (Oxford, England)     Volume:  22     ISSN:  0268-1161     ISO Abbreviation:  Hum. Reprod.     Publication Date:  2007 Aug 
Date Detail:
Created Date:  2007-07-27     Completed Date:  2007-10-12     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8701199     Medline TA:  Hum Reprod     Country:  England    
Other Details:
Languages:  eng     Pagination:  2202-7     Citation Subset:  IM    
Reproductive Centre, Institution of Women's and Children's health, Academic Hospital, 751 85 Uppsala, Sweden.
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MeSH Terms
Birth Rate* / trends
Embryo Transfer* / adverse effects,  trends
Pregnancy, Multiple* / statistics & numerical data
Sweden / epidemiology
United States / epidemiology

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