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Summary
This study calculated births prevented by contraceptive services. Intrauterine contraception in Singapore prevented approximately 4,800 births among 9,000 postpartum women over three years.
Area of Science:
- Reproductive Health
- Demography
- Public Health
Background:
- Calculating births prevented is crucial for assessing contraceptive service impact.
- Previous methods relied on fertility rates, potentially overestimating impact.
Purpose of the Study:
- To refine the calculation of births prevented by contraceptive services.
- To introduce a novel methodology using inter-live birth intervals and sterility probabilities.
Main Methods:
- Utilized age-specific mean inter-live birth intervals.
- Incorporated factors like postpartum sterility and permanent sterility probabilities.
- Applied the method to intrauterine contraception users in Singapore.
Main Results:
- Approximately 4,800 births were prevented.
- This occurred within the first three years of follow-up.
- The study involved around 9,000 postpartum women of diverse ethnic backgrounds.
Conclusions:
- The refined method provides a more accurate estimation of contraceptive effectiveness.
- Intrauterine contraception demonstrated significant success in preventing births in the studied population.
- This approach enhances the evaluation of family planning program outcomes.
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