A recent study supported by the National Institutes of Health (NIH) suggests a dose-dependent relationship between sleep disordered breathing (SDB) in early pregnancy and the subsequent development of gestational diabetes. No relationships between SDB during pregnancy and preeclampsia, preterm birth, and extremes of birth weight were demonstrated.
The study titled “Implications of sleep-disordered breathing in pregnancy” published in the American Journal of Obstetrics & Gynecology, the objective of the study was to examine the relationship between sleep-disordered breathing (SDB) and adverse pregnancy outcomes in a high-risk cohort.
The study was a planned analysis of a prospective cohort designed to estimate the prevalence and trends of SDB in high-risk pregnant women. “We recruited women with a body mass index of 30 kg/m2 or greater, chronic hypertension, pregestational diabetes, prior preeclampsia, and/or a twin gestation,” write researchers in the AJOG abstract. “Objective assessment of SDB was completed between 6 and 20 weeks and again in the third trimester. SDB was defined as an apnea hypopnea index of 5 or greater and further grouped into severity categories: mild SDB (5-14.9), moderate SDB (15-29.9), and severe SDB (≥30). Pregnancy outcomes (preeclampsia, gestational diabetes, preterm birth, infant weight) were abstracted by physicians blinded to the SDB results.”
Of the 188 women with a valid early pregnancy sleep study, 182 had complete delivery records. There was no relationship demonstrated between SDB exposure in early or late pregnancy and preeclampsia, preterm birth less than 34 weeks, and small-for-gestational-age (<5%), or large-for-gestational-age (>95%) neonates. However, SDB severity in early pregnancy was associated with the risk of developing gestational diabetes.
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