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Hum. Reprod. Advance Access originally published online on December 9, 2004
Human Reproduction 2005 20(3):722-727; doi:10.1093/humrep/deh664
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Human Reproduction Vol. 20 No. 3 © The Author 2004; all rights reserved

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

Anne K. Omland1, Thomas Åbyholm, Peter Fedorcsák, Gudvor Ertzeid, Nan B. Oldereid, Sverre Bjercke and Tom Tanbo

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

1 To whom correspondence should be addressed. Email: anne.omland{at}rikshospitalet.no

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.

Key words: endometriosis/IVF/pregnancy outcome/unexplained infertility


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