Getting comfortable sleep during pregnancy is possible with the right position, pillow setup, and a few habit adjustments. Sleep disruptions affect roughly 44% of women in the first trimester and climb to nearly 64% by the third, so if you’re struggling, you’re in very large company. The good news: most of the discomfort has straightforward, low-tech solutions.
Why Side Sleeping Matters After 28 Weeks
During the first trimester, you can sleep in whatever position feels comfortable. But once your uterus grows heavy enough, lying flat on your back compresses the large vein that returns blood to your heart (the inferior vena cava) against your spine. This compression can reduce blood flow through the aorta by almost 30%, which lowers the amount of oxygen reaching the placenta. A review of the evidence by NICE found that going to sleep on your back after 28 weeks is associated with an increased risk of stillbirth and smaller birth weight, and current guidance recommends trying to fall asleep on your side from that point on.
Left side is traditionally recommended because it takes the most pressure off that major vein, but either side works. If you wake up on your back, don’t panic. The risk is tied to the position you fall asleep in most often, not occasional shifting during the night. Simply roll back onto your side and resettle.
How to Set Up Your Pillows
A single pillow under your head isn’t enough to keep your body aligned on its side. The goal is to get your spine, hips, and pelvis into a neutral, stacked position so nothing is pulling or twisting.
- Between your knees, thighs, and feet: Place a pillow (or pillows) so your upper leg sits even with your pelvis and mirrors the angle of your bottom leg. This prevents your top knee from dropping forward and rotating your lower spine.
- Under your belly: A small rolled towel or thin pillow tucked beneath your abdomen supports the weight of your uterus so it doesn’t pull on your back.
- Along your back: If you tend to roll onto your back in your sleep, wedge a firm pillow behind you. This also works as a spinal support if you place a rolled towel between your ribs and hips.
Full-length pregnancy pillows (C-shaped or U-shaped) combine several of these functions into one piece. They’re not required, but many women find them easier than arranging four separate pillows every night. If you’re buying one, the key feature to look for is enough firmness between the knees to actually keep your hips level. A pillow that compresses flat under the weight of your leg won’t do much.
Managing Heartburn at Night
Pregnancy hormones relax the valve at the top of your stomach, and your growing uterus pushes stomach contents upward. The result is acid reflux that often peaks right after dinner and when you lie down. Regular pillows only elevate your head, which isn’t enough to stop acid from traveling up your esophagus. What works is elevating your entire upper torso.
A wedge pillow angled between 30 and 45 degrees, raising your head six to twelve inches above your hips, keeps gravity working in your favor. Position the thin end of the wedge between your hips and mid-back so your head and shoulders are fully supported on the slope. You can combine this with side sleeping by placing the wedge at an angle on your mattress. Eating your last meal two to three hours before bed also helps, since reflux is worst shortly after eating.
Reducing Nighttime Bathroom Trips
Frequent urination is one of the most common sleep disruptors in pregnancy, especially in the third trimester when the baby presses directly on your bladder. You can’t eliminate it entirely, but you can reduce the number of trips by shifting when you drink your fluids. Front-load your water intake earlier in the day and taper off in the two to three hours before bed. Research on nocturia suggests that managing overall fluid distribution throughout the day, not just cutting off liquids at night, makes the biggest difference. You still need to stay well hydrated during pregnancy, so the goal is timing, not restriction.
Restless Legs and Leg Cramps
That crawling, twitchy sensation in your legs that hits right when you’re trying to fall asleep is restless legs syndrome, and it’s significantly more common during pregnancy. Low iron (ferritin) and low folate levels before and during pregnancy are both linked to worse symptoms, as is vitamin D deficiency. Two studies found an inverse relationship between vitamin D levels and the severity of restless legs, meaning the lower your vitamin D, the more intense the discomfort.
Iron and folic acid supplementation is already standard in prenatal care, but if your symptoms are significant, it’s worth having your ferritin and vitamin D levels checked specifically. For mild cases, gentle leg stretching before bed and moderate daily exercise both help. Heavy or intense exercise, particularly in the evening, can actually make symptoms worse. Compression stockings may also provide relief if you have varicose veins contributing to leg discomfort.
Getting In and Out of Bed Without Pain
As your belly grows, the simple act of lying down and sitting up can strain your back and abdominal muscles. The log roll technique eliminates twisting and keeps your core stable.
To lie down: sit on the edge of the bed, then use your arms to lower your upper body sideways onto the mattress while your legs rise to meet your torso. Think of your trunk as a single plank that doesn’t bend or twist. Your arms bear the weight as you lower yourself, not your abs. Move slowly.
To get up, reverse the process. Roll onto the side you want to exit from, then use your arms to push your upper body upright as your legs swing down to the floor. Keep your back straight the entire time. This sounds overly careful, but it makes a noticeable difference in back pain, especially in the third trimester when your center of gravity has shifted and your abdominal muscles are stretched.
When Snoring Becomes Something More
Some snoring during pregnancy is normal due to swollen nasal passages and weight gain. But loud, frequent snoring combined with extreme daytime sleepiness, morning headaches, or gasping during sleep may point to obstructive sleep apnea. Pregnancy increases the risk, and the stakes are higher than just poor sleep quality. Women diagnosed with sleep apnea during pregnancy face roughly 2.5 times the odds of developing gestational hypertension or preeclampsia, and nearly twice the odds of preterm delivery.
If your partner notices that you stop breathing during sleep, or if you’re experiencing crushing fatigue that goes well beyond normal pregnancy tiredness, bring it up at your next appointment. Diagnosis typically involves an overnight sleep study, and treatment during pregnancy is safe and effective.
Building a Sleep-Friendly Routine
Position and pillows solve the mechanical problems, but pregnancy insomnia is also driven by hormones, anxiety, and discomfort that no pillow can fix. A few adjustments that work with your body rather than against it: keep your bedroom cool (your basal temperature is already elevated during pregnancy), use a consistent bedtime even on weekends, and get your moderate exercise earlier in the day rather than close to bedtime.
If you’re lying awake for more than 20 minutes, get up and do something quiet in dim light rather than forcing yourself to stay in bed. Training your brain to associate the bed with frustration makes insomnia worse over time. The discomfort and disrupted sleep are temporary, and most of these strategies make a real difference within a few nights of consistent use.