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Prevalence of Uterine Leiomyomas in the First Trimester of Pregnancy: An Ultrasound-Screening Study

Citation

Laughlin, Shannon K.; Baird, Donna D.; Savitz, David A.; Herring, Amy H.; & Hartmann, Katherine E. (2009). Prevalence of Uterine Leiomyomas in the First Trimester of Pregnancy: An Ultrasound-Screening Study. Obstetrics & Gynecology, 113(3), 630-635. PMCID: PMC3384531

Abstract

OBJECTIVE: To estimate the proportion of pregnant women with one or more leiomyomas detected by research-quality ultrasound screening in the first trimester, to describe the size and location of leiomyomas identified, and to report variation in prevalence by race/ethnicity.
METHODS: Within an ongoing prospective cohort, we conducted 4,271 first-trimester or postmiscarriage ultrasound examinations. Sonographers measured each leiomyoma three separate times, recording the maximum diameter in three perpendicular planes each time. Sonographers and investigators classified type and location.
RESULTS: Among 458 women with one or more leiomyomas (prevalence 10.7%), we identified a total of 687 leiomyomas. The mean size of the largest leiomyoma was 2.3 cm (95% confidence interval [CI] 1.8-2.8). Mean gestational age at ultrasonography was 61+/-13 days from last menstrual period. Prevalence varied by race/ethnicity: 18% in African-American women (95% CI 13-25), 8% in white women (95% CI 7-11), and 10% in Hispanic women (95% CI 5-19). The proportion of women with leiomyomas increased with age much more steeply for African-American women than for white women.
CONCLUSION: Leiomyomas are common in pregnancy and occur more often among African-American women. Given the limited research on effects of leiomyomas on reproductive outcomes, the degree to which race/ethnic disparities in prevalence of leiomyomas may contribute to disparities in events such as miscarriage and preterm birth warrants investigation.

URL

http://dx.doi.org/10.1097/AOG.0b013e318197bbaf

Reference Type

Journal Article

Year Published

2009

Journal Title

Obstetrics & Gynecology

Author(s)

Laughlin, Shannon K.
Baird, Donna D.
Savitz, David A.
Herring, Amy H.
Hartmann, Katherine E.

PMCID

PMC3384531