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Hum. Reprod. Advance Access published online on December 9, 2004
Human Reproduction, doi:10.1093/humrep/deh664
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Human Reproduction © European Society of Human Reproduction and Embryology 2004; all rights reserved
Received August 31, 2004
Accepted November 19, 2004

Article

Pregnancy outcome after IVF and ICSI in unexplained, endometriosis-associated and tubal factor infertility

Anne K. Omland 1*, Thomas Åbyholm 1, Peter Fedorcsák 1, Gudvor Ertzeid 1, Nan B. Oldereid 1, Sverre Bjercke 1, and Tom Tanbo 1

1 Department of Obstetrics and Gynaecology, National Hospital, University of Oslo, Sognsvannsveien 20, 0027 Oslo, Norway

* To whom correspondence should be addressed.
Anne K. Omland, E-mail: anne.omland{at}rikshospitalet.no


  Abstract

BACKGROUND: This study was undertaken in order to compare pregnancy outcome after IVF and ICSI in unexplained and endometriosis-associated infertility using tubal factor infertility as controls. METHODS: This was a retrospective cohort study of early IVF/ICSI pregnancies verified by serum hCG measurement, comparing the subsequent outcome in unexplained (n=274) and minimal endometriosis-associated (n=212) with tubal factor (n=540) infertility as controls. From January 1990 to December 2002, 1026 conception cycles after treatment with IVF or ICSI complied with the inclusion criteria. RESULTS: Live birth rate, twin birth rate after transfer of two embryos and abortion rate prior to 6 weeks of gestation were superior for the unexplained (78.8, 23.5 and 11.7%) compared to endometriosis-associated (66.0, 15.0 and 19.3%) and tubal factor (66.7, 18.1 and 18.0%) infertility groups (P<0.05). Compared to the endometriosis-associated, the unexplained infertility group attained a higher pregnancy rate after the first treatment cycle (P<0.05). CONCLUSIONS: The overall better outcome for the unexplained infertility group with respect to live birth rate, twin birth rate and early abortion rate compared to the minimal peritoneal endometriosis-associated and tubal factor infertility groups might be a guide to select diagnostic groups for single embryo transfer and be useful in patient counselling.

Keywords: endometriosis; IVF; pregnancy outcome; unexplained infertility.
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