Obstructive sleep apnoea in multiple pregnancy.

Obstructive sleep apnoea (OSA) during pregnancy has been associated with gestational diabetes mellitus, hypertension and low birth weight. Multiple pregnancy is associated with similar adverse perinatal outcomes. Multiple pregnancy rates have risen with increased access to assisted conception; simultaneously, advancing maternal age and weight are also driving a rise in the incidence of OSA in pregnancy. The intersection of OSA and multiple pregnancy would be presumed to have significant maternal and fetal morbidity; however, specific data are sparse. We review the current state of knowledge on OSA in multiple pregnancy.