Sleep Apnea During Pregnancy

Pregnancy creates a cascade of physiological changes that can contribute to sleep-disordered breathing. As pregnancy progresses, several factors converge to increase the likelihood of airway obstruction during sleep.

Weight gain is a significant factor. The additional tissue in the neck and throat area can narrow the airway, making collapse during sleep more likely. Hormonal changes — particularly elevated progesterone — can relax airway dilator muscles. While progesterone stimulates breathing, it can also contribute to airway laxity.

Nasal congestion, common during pregnancy due to hormonal effects on mucous membranes, increases upper airway resistance. Additionally, as the uterus grows, it pushes against the diaphragm and reduces lung volume, which can worsen breathing during sleep — especially in the supine position.

Untreated obstructive sleep apnea during pregnancy is not simply a matter of poor sleep — it carries meaningful health risks for both mother and baby. The intermittent oxygen drops and sympathetic nervous system activation caused by sleep apnea can affect pregnancy outcomes.

Home sleep testing is generally safe during pregnancy and is often preferred over in-lab studies for comfort and convenience. A home sleep test measures breathing patterns, oxygen levels, and heart rate while you sleep in your own bed.

Your sleep provider will determine the appropriate diagnostic approach based on your symptoms, pregnancy stage, and medical history. Diagnosis is important because treatment can reduce the risk of pregnancy complications associated with sleep apnea.

Treatment decisions during pregnancy must balance effectiveness with safety for both mother and baby. The most common treatment approaches include:

CPAP therapy is considered safe during pregnancy and is often the first-line treatment for moderate to severe sleep apnea. For mild cases or when CPAP is not tolerated, positional therapy (encouraging side sleeping) can be effective.

Oral appliance therapy may be appropriate for some pregnant patients with mild to moderate sleep-disordered breathing who cannot tolerate CPAP. This should be coordinated between your sleep provider, obstetrician, and dental sleep medicine specialist.

Sleep apnea symptoms may improve after delivery as hormone levels normalize and the physical changes of pregnancy resolve. However, some women continue to experience sleep-disordered breathing — particularly those who had sleep apnea before pregnancy, gained significant weight, or have anatomical risk factors.

A follow-up sleep evaluation after delivery can determine whether ongoing treatment is needed. This is especially important because untreated sleep apnea can affect postpartum energy levels, mood, and recovery — and the demands of caring for a newborn make quality sleep more important than ever.