How does advanced paternal age generally compare to advanced maternal age in terms of overall fertility risk?

• A. Lower overall risk than advanced maternal age.
• B. Higher overall risk than advanced maternal age.
• C. No impact on time to conception.
• D. Always results in offspring with defects.

Answer: (A)

Fertility declines more steeply with female aging than with male aging. As women age, ovarian reserve and oocyte quality diminish, leading to harder time conceiving and higher risks for miscarriage and chromosomal abnormalities. These changes become more pronounced after the mid-30s and especially after 40, making advanced maternal age a stronger overall fertility risk.

Advanced paternal age does affect fertility too—semen parameters can worsen and time to conception may lengthen somewhat, and there are increases in certain risks for offspring due to de novo mutations—but these effects are generally less dramatic than those seen with advanced maternal age. So, overall, advanced paternal age is associated with a lower fertility risk compared with advanced maternal age.

The other options aren’t accurate because paternal age can influence time to conception, and advanced paternal age does not guarantee offspring defects; it raises some risks but not in a deterministic way.