Medscape reported that 1/2 snoring hypertensive pregnant women and 1/4 non-snoring pregnant women have undiagnosed OSA (i.e., obstructive sleep apnea syndrome), in a study published online in BJOG on May 29, 2014. sleep apnea during pregnancy is often associated with low nocturnal blood oxygen levels and other disorders, and 1/3 of pregnant women are affected in the second trimester of pregnancy. Habitual snoring is associated with adverse maternal and child pregnancy outcomes, including increased risk of cesarean section and smaller babies,” Dr. Louise of the University of Michigan Sleep Disorders Center noted in a news release. Studies have shown that many pregnant women with high blood pressure suffer from sleep apnea. Habitual snoring may be one of the most clinically significant manifestations. The aim of this trial was to study the prevalence of sleep apnea in pregnant women with/without hypertensive disorders. Pregnant women were classified as normotensive and hypertensive (chronic hypertension, gestational hypertension or pre-eclampsia). Subjects completed a habitual snoring questionnaire, underwent polysomnography and were followed up to determine the prevalence and extent of the disease. Sleep apnea patients in this study accounted for 61% and 19% of the hypertensive and normotensive groups, respectively. More than 25% of hypertensive women had moderate to severe sleep apnea. The apnea/hypoxia index was much higher in snoring hypertensive women than in non-snorers. Chronic snoring women may have hypertension, and pregnant hypertensive women are more likely to snore during pregnancy. Pregnant women with hypertension who snore should be evaluated for OSA, and sleep apnea during pregnancy is treatable. Timely diagnosis, identification and treatment not only benefit the health of mother and child but also help reduce the high cost of cesarean section, admission of the baby to the NICU and other associated risks. As maternity patients become fatter, they may encounter more pregnant women with sleep apnea, which is characterized by significant and persistent respiratory sleep disturbances and daytime sleepiness. Sleep quality can be improved with CPAP (continuous positive pressure ventilation) therapy. Pregnant women suspected by their obstetrician to have sleep breathing disorders should be encouraged to continue CPAP therapy during pregnancy while also referring to the diagnosis and treatment plan of their sleep specialist.