Journal
AMERICAN JOURNAL OF OBSTETRICS AND GYNECOLOGY
Volume 189, Issue 4, Pages 901-905Publisher
MOSBY-ELSEVIER
DOI: 10.1067/S0002-9378(03)00753-1
Keywords
paternal age; maternal age; infertility
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OBJECTIVE: The purpose of this study was to examine the risk of infertility that is associated with paternal age, because this factor rarely has been investigated, whereas maternal age of greater than or equal to35 years is a well-known risk factor. STUDY DESIGN: This large, retrospective, population-based sample included 6188 European women (from Denmark, Italy, Spain, Germany) aged 25 to 44 years who were selected randomly from census registers in 1991 through 1993. RESULTS: Among couples composed of a woman aged 35 to 39 years, risks were significantly higher when paternal age was greater than or equal to40 years than when paternal age was < 40 years, with an adjusted odds ratio of 2.21 (95% Cl, 1.13, 4.33) for delay in pregnancy onset (failure to conceive within 12 months) and of 3.02 (95% Cl, 1.56, 5.85) for difficulties in having a baby (failure to conceive within 12 months or pregnancy not resulting in a live birth). CONCLUSION: Like maternal age of greater than or equal to35 years, paternal age of greater than or equal to40 years should be considered to be a key risk factor for infertility.
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