Effects of Interpregnancy Interval and Outcome of the Preceding Pregnancy on Pregnancy Outcomes in Matlab, Bangladesh
Overview
Authors
Affiliations
Objective: To estimate the effects on pregnancy outcomes of the duration of the preceding interpregnancy interval (IPI) and type of pregnancy outcome that began the interval.
Design: Observational population-based study.
Setting: The Maternal Child Health-Family Planning (MCH-FP) area of Matlab, Bangladesh.
Population: A total of 66,759 pregnancy outcomes that occurred between 1982 and 2002.
Methods: Bivariate tabulations and multinomial logistic regression analysis.
Main Outcome Measures: Pregnancy outcomes (live birth, stillbirth, miscarriage [spontaneous fetal loss prior to 28 weeks], and induced abortion).
Results: When socio-economic and demographic covariates are controlled, of the IPIs that began with a live birth, those < 6 months in duration were associated with a 7.5-fold increase in the odds of an induced abortion (95% CI 6.0-9.4), a 3.3-fold increase in the odds of a miscarriage (95% CI 2.8-3.9), and a 1.6-fold increase in the odds of a stillbirth (95% CI 1.2-2.1) compared with 27- to 50-month IPIs. IPIs of 6-14 months were associated with increased odds of induced abortion (2.0, 95% CI 1.5-2.6). IPIs > or = 75 months were associated with increased odds of all three types of non-live-birth (NLB) outcomes but were not as risky as very short intervals. IPIs that began with a NLB were generally more likely to end with the same type of NLB.
Conclusions: Women whose pregnancies are between 15 and 75 months after a preceding pregnancy outcome (regardless of its type) have a lower likelihood of fetal loss than those with shorter or longer IPIs. Those with a preceding NLB outcome deserve special attention in counselling and monitoring.
Terefe B, Jembere M, Abrha N, Asgedom D, Assefa S, Assimamaw N Glob Health Res Policy. 2025; 10(1):11.
PMID: 40016816 PMC: 11866572. DOI: 10.1186/s41256-024-00395-6.
Birhanie A, Tessema Z, Endalew B, Tamirat K BMC Pediatr. 2025; 25(1):103.
PMID: 39923019 PMC: 11806815. DOI: 10.1186/s12887-025-05454-6.
Terefe B, Workneh B, Zeleke G, Mekonen E, Zegeye A, Aemro A PLoS One. 2025; 20(1):e0314309.
PMID: 39820848 PMC: 11737728. DOI: 10.1371/journal.pone.0314309.
Haider M, Rahman M, Khan S, Efa T, Rahman M J Glob Health. 2024; 14:04246.
PMID: 39700387 PMC: 11658713. DOI: 10.7189/jogh.14.04246.
Setu S, Kabir R, Islam M, Alauddin S, Nahar M PLOS Glob Public Health. 2024; 4(12):e0004062.
PMID: 39693329 PMC: 11654928. DOI: 10.1371/journal.pgph.0004062.