Does induced abortion increase the risk of preterm birth? results from a case-control study

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Abstract

Aims: We analyzed the association between previous induced abortions and risk of preterm birth. Methods: This was a case-control study. Cases were 502 women who delivered preterm babies at the Clinica Luigi Mangiagalli and the Obstetric and Gynecology Clinic of the University of Verona. Controls were 1,966 women who gave birth at term (≥37 weeks of gestation) to healthy infants of normal weight. Results: The odds ratio for all preterm births was 0.7 (95% CI 0.5-1.1) for women reporting 1 induced abortion and 1.6 (95% CI 0.7-3.5) for those reporting 2 or more induced abortions (χ2 trend p = 0.81). Previous induced abortions did not increase the risk of preterm birth, both in small and normal for gestational age preterm infants. No difference emerged in risk factors for infants born at

Original languageEnglish
Pages (from-to)40-45
Number of pages6
JournalGynecologic and Obstetric Investigation
Volume69
Issue number1
DOIs
Publication statusPublished - Jan 2010

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Induced Abortion
Premature Birth
Case-Control Studies
Gynecology
Premature Infants
Gestational Age
Obstetrics
Odds Ratio
Parturition
Weights and Measures
Pregnancy

Keywords

  • Abortion, induced
  • Birth weight
  • Preterm birth, risk factors

ASJC Scopus subject areas

  • Obstetrics and Gynaecology
  • Reproductive Medicine

Cite this

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title = "Does induced abortion increase the risk of preterm birth? results from a case-control study",
abstract = "Aims: We analyzed the association between previous induced abortions and risk of preterm birth. Methods: This was a case-control study. Cases were 502 women who delivered preterm babies at the Clinica Luigi Mangiagalli and the Obstetric and Gynecology Clinic of the University of Verona. Controls were 1,966 women who gave birth at term (≥37 weeks of gestation) to healthy infants of normal weight. Results: The odds ratio for all preterm births was 0.7 (95{\%} CI 0.5-1.1) for women reporting 1 induced abortion and 1.6 (95{\%} CI 0.7-3.5) for those reporting 2 or more induced abortions (χ2 trend p = 0.81). Previous induced abortions did not increase the risk of preterm birth, both in small and normal for gestational age preterm infants. No difference emerged in risk factors for infants born at",
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author = "Fabio Parazzini and Elena Ricci and Francesca Chiaffarino and Sonia Cipriani and Luca Tozzi and Luigi Fedele",
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AU - Parazzini, Fabio

AU - Ricci, Elena

AU - Chiaffarino, Francesca

AU - Cipriani, Sonia

AU - Tozzi, Luca

AU - Fedele, Luigi

PY - 2010/1

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N2 - Aims: We analyzed the association between previous induced abortions and risk of preterm birth. Methods: This was a case-control study. Cases were 502 women who delivered preterm babies at the Clinica Luigi Mangiagalli and the Obstetric and Gynecology Clinic of the University of Verona. Controls were 1,966 women who gave birth at term (≥37 weeks of gestation) to healthy infants of normal weight. Results: The odds ratio for all preterm births was 0.7 (95% CI 0.5-1.1) for women reporting 1 induced abortion and 1.6 (95% CI 0.7-3.5) for those reporting 2 or more induced abortions (χ2 trend p = 0.81). Previous induced abortions did not increase the risk of preterm birth, both in small and normal for gestational age preterm infants. No difference emerged in risk factors for infants born at

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