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Uterine Fibroids and Pregnancy: How Do They Affect Each Other?

期刊

REPRODUCTIVE SCIENCES
卷 29, 期 8, 页码 2145-2151

出版社

SPRINGER HEIDELBERG
DOI: 10.1007/s43032-021-00656-6

关键词

Pregnancy; Uterine leiomyoma; Fibroids; Placental abruption; Miscarriage; Placenta previa; Cesarean section; Pregnancy outcome

资金

  1. Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)
  2. Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior (CAPES)
  3. Fundacao de Amparo a Pesquisa do Estado de Minas Gerais (FAPEMIG)

向作者/读者索取更多资源

Uterine leiomyoma and pregnancy may impact each other, with evidence suggesting increased risks of adverse pregnancy outcomes such as spontaneous abortion, placenta previa, placental abruption, and fetal malpresentation in the presence of leiomyomas. Multiple and large fibroids may also contribute to higher rates of cesarean section and preterm birth. Future studies should focus on evaluating the growth pattern of leiomyomas and their influence on obstetric outcomes by enrolling women diagnosed with fibroids prior to pregnancy and following them prospectively throughout gestation and puerperium.
The present narrative review is aimed to rekindle discussion regarding whether and how uterine leiomyoma and pregnancy may impact each other. Although fibroids are hormone-dependent lesions, their growth during pregnancy seems to have a nonlinear trend. Besides placental estrogens and progesterone, an array of endocrine and paracrine factors affect fibroid blood supply, growth rate, and risk of degeneration along the gestational and puerperal periods. According to current evidence, the presence of leiomyomas might increase the risk of some adverse pregnancy outcomes. Although a causative relation between fibroids and spontaneous abortion is questionable, the presence of multiple submucosal lesions in certain populations, such as infertile women, may increase the risk of pregnancy loss. Slightly increased risks of placenta previa, placental abruption and fetal malpresentation may occur, mainly due to the mechanical influence of multiple and large fibroids. Cesarean section and preterm birth rates are also probably increased in the presence of fibroids. The risk associations are based on meta-analyses of cohort studies (level of evidence 2a), retrospective cohort studies (2b), case-control (3a), and cross-sectional studies (3b), but with a predominantly low risk of bias. For evaluating the growth pattern of leiomyomas and their real influence on obstetric outcomes, future studies should enroll women with fibroids diagnosed prior to pregnancy and follow them prospectively throughout the gestation and puerperium.

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