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[Parental age and genetic risks for the offspring].

¹Département de génétique et Inserm U393, hôpital Necker-Enfants Malades, 149-161, rue de Sèvres, 75743 Paris, France. vekemans@necker.fr

Gynecologie, Obstetrique & Fertilite

|December 14, 2002

Summary

Advanced paternal age increases the risk of some genetic defects, but the relationship is complex. Increasing maternal age is the only confirmed factor for human aneuploidy, highlighting the need for further research into age-related genetic risks.

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Area of Science:

Reproductive genetics and developmental biology.
Human genetics and genomics.
Maternal and paternal age-related health risks.

Context:

The precise impact of parental age on offspring genetic defects is not fully elucidated.
Existing research indicates a link between advanced paternal age and certain Mendelian disorders.
Increasing maternal age is a known risk factor for human aneuploidy.

Purpose:

To review and synthesize current understanding of age-related risks for genetic defects in offspring.
To explore the heterogeneous relationship between paternal age and specific genetic disorders.
To clarify the established role of maternal age in aneuploidy.

Summary:

Advanced paternal age is associated with an increased frequency of some Mendelian disorders, though this association is heterogeneous.

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A subset of common birth defects may arise from novel dominant mutations of paternal origin.

Advanced maternal age is the sole, unequivocally established risk factor for human aneuploidy.

Impact:

Highlights gaps in understanding the complex interplay between parental age and offspring genetic health.
Underscores the need for targeted research into paternal age effects on specific genetic conditions.
Reinforces the critical importance of maternal age in aneuploidy risk assessment and counseling.