Prospective Cohort Study of Uterine Fibroids and Miscarriage Risk

Katherine E. Hartmann, Digna R.Velez Edwards, David A. Savitz, Michele L. Jonsson-Funk, Pingsheng Wu, Alexandra C. Sundermann, Donna D. Baird

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

Abstract

We sought to determine the relationship of fibroids to pregnancy loss in a prospective cohort in which fibroid status was uniformly documented in early pregnancy. Participants had an intake interview, transvaginal ultrasonography, computer-assisted telephone interview, and follow-up assessment of outcomes. We recruited diverse participants for the Right From the Start study from 8 metropolitan areas in 3 states in the United States during 2000-2012. Participants were at least 18 years of age, trying to become pregnant or at less than 12 weeks' gestation, not using fertility treatments, fluent in English or Spanish, and available for telephone interviews. Miscarriage was defined as loss before 20 weeks' gestation. Fibroid presence, number, type, and volume were assessed using standardized ultrasonography methods. We used proportional hazards models to estimate associations. Among 5,512 participants, 10.4% had at least 1 fibroid, and 10.8% experienced a miscarriage. Twenty-three percent had experienced a prior miscarriage and 52% prior births. Presence of fibroids was associated with miscarriage in models without adjustments. Adjusting for key confounders indicated no increase in risk (adjusted hazard ratio = 0.83, 95% confidence interval: 0.63, 1.08). No characteristic of fibroids was associated with risk. Prior evidence attributing miscarriage to fibroids is potentially biased. These findings imply that surgical removal of fibroids to reduce risk of miscarriage deserves careful scrutiny.

Original languageEnglish
Pages (from-to)1140-1148
Number of pages9
JournalAmerican Journal of Epidemiology
Volume186
Issue number10
DOIs
StatePublished - Nov 15 2017

Bibliographical note

Publisher Copyright:
© 2017 The Author(s).

Keywords

  • fibroids
  • first trimester
  • miscarriage
  • pregnancy
  • reproductive epidemiology
  • spontaneous abortion
  • uterine leiomyoma

ASJC Scopus subject areas

  • General Medicine

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