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Summary
Historical data reveal that women face only moderate increases in sterility until their late thirties. Recent changes in reproductive behavior create the perception of rising infertility, despite limited impact from sexually transmitted infections.
Area of Science:
- Demography
- Reproductive Health
- Historical Epidemiology
Background:
- Contemporary populations lack direct evidence on age-related infecundity and sterility due to widespread contraception and sterilization.
- Understanding age patterns of fecundity is crucial for reproductive health and demographic studies.
Purpose of the Study:
- To estimate upper bounds for age-specific sterility proportions in contemporary populations using historical data.
- To assess the impact of recent changes in sexual behavior, particularly sexually transmitted infections (STIs), on infecundity.
- To analyze the perception of rising infertility in relation to actual changes in fecundity.
Main Methods:
- Utilized historical demographic data to infer upper bounds on sterility rates at different ages.
- Examined trends in sexual behavior and their potential link to increased infecundity.
- Evaluated the contribution of STIs to infertility in recent decades.
Main Results:
- Historical data provide applicable upper bounds for contemporary age-specific sterility.
- Sexually transmitted infections are unlikely to be a major driver of increased infecundity.
- Women in monogamous unions experience only moderate increases in sterility risk until their late thirties.
Conclusions:
- The perception of rising infecundity is largely driven by recent changes in reproductive behavior, not a substantial increase in biological sterility.
- Despite societal perceptions, biological infecundity increases moderately with age until the late thirties.
- Further research into reproductive behavior and its impact on perceived and actual fertility is warranted.