Snoring during pregnancy and delivery outcomes: a cohort study

Sleep. 2013 Nov 1;36(11):1625-32. doi: 10.5665/sleep.3112.


Study objective: This cohort study examined the impact of maternal snoring on key delivery outcomes such as mode of delivery, infant birth centile, and small-for-gestational age.

Design: Cohort study.

Setting: A large tertiary medical center.

Patients or participants: Pregnant women in their third trimester were recruited between March 2007 and December 2010.

Measurements and results: Women were screened for habitual snoring, as a known marker for sleep disordered breathing. Outcome data were obtained from medical records following delivery and birth centiles were calculated. Of 1,673 women, a total of 35% reported habitual snoring (26% with pregnancy-onset snoring and 9% with chronic snoring). After adjusting for confounders, chronic snoring was associated with small-forgestational age (OR 1.65, 95%CI 1.02-2.66, P = 0.041) and elective cesarean delivery (OR 2.25, 95%CI 1.22-4.18, P = 0.008). Pregnancy-onset snoring was associated with emergency cesarean delivery (OR 1.68, 95%CI 1.22-2.30, P = 0.001).

Conclusion: Maternal snoring during pregnancy is a risk factor for adverse delivery outcomes including cesarean delivery and small-for-gestational age. Screening pregnant women for symptoms of SDB may provide an early opportunity to identify women at risk of poor delivery outcomes.

Clinical trials registration: IDENTIFIER: NCT01030003.

Keywords: Sleep disordered breathing; cesarean delivery; cord blood; small for gestational age.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Birth Weight
  • Cesarean Section / statistics & numerical data
  • Cohort Studies
  • Delivery, Obstetric / statistics & numerical data*
  • Female
  • Humans
  • Infant, Newborn
  • Infant, Small for Gestational Age
  • Pregnancy
  • Pregnancy Complications / epidemiology*
  • Pregnancy Outcome / epidemiology*
  • Risk Factors
  • Snoring / complications*

Associated data