Fathers over 40 and increased failure to conceive: the lessons of in vitro fertilization in France

Elise de La Rochebrochard (1, 2) , Jacques de Mouzon (1, 2) , François Thépot (3) , Patrick Thonneau (4)

1 INED - Institut national d'études démographiques
2 Inserm U569 - Epidémiologie, Démographie et Sciences Sociales : santé reproductive, sexualité et infection à VIH
3 Laboratoire de biologie de la reproduction [CHU Amiens]
4 GRFH - Groupe de recherche en fertilité humaine

OBJECTIVE: To investigate paternal age effect mediated by biological modifications with use of data from assisted reproductive technologies. DESIGN: National IVF registry. SETTING: Fifty nine French IVF centers. PATIENT(S): A total of 1,938 men whose partners were totally sterile, with bilateral tubal obstruction or absence of both tubes (to avoid bias sampling in analysis of paternal age) and treated by conventional IVF. INTERVENTION(S): None. MAIN OUTCOME MEASURE(S): Risk of failure to conceive defined as absence of intrauterine pregnancy. RESULT(S): The odds ratio of failure to conceive for paternal age > or =40 years was 2.00 (95% confidence interval [CI]: 1.10-3.61) when the woman was 35-37 years old, 2.03 (95% CI: 1.12-3.68) for age 38-40 years, and 5.74 (95% CI: 2.16, 15.23) for age 41 years and over. CONCLUSION(S): As an increasing number of couples choose to postpone childbearing, they should be informed that paternal age over 40 years is an important risk factor for failure to conceive.

Mots clés: Paternal age; Maternal age; Infertility; Fertilization in Vitro

Domaines: Santé publique et épidémiologie; Démographie

Elise de La Rochebrochard, Jacques de Mouzon, François Thépot, Patrick Thonneau. Fathers over 40 and increased failure to conceive: the lessons of in vitro fertilization in France. Fertility and Sterility, 2006, 85 (5), pp.1420-1424. ⟨10.1016/j.fertnstert.2005.11.040⟩. ⟨hal-02263774⟩