
Sleeping on your back while pregnant has been a topic of debate for years. While some studies have shown that there is an increased risk of stillbirth for back sleepers after 28 weeks, others have found no association between back sleeping and stillbirth. The consensus among healthcare professionals is that sleeping on your side is the safest position during pregnancy, especially in the third trimester. This is because sleeping on your side provides optimal blood flow to the fetus and prevents compression of the blood flow to the uterus. However, some experts say it is okay to sleep in whatever position is most comfortable for the mother.
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What You'll Learn
- Sleeping on your back during pregnancy may increase the risk of stillbirth
- Sleeping on your left side is often recommended for optimal blood flow
- Sleeping on your stomach is usually fine until weeks 16-18
- Sleeping on your side with a pillow behind your back can be comfortable
- There are strategies to help you sleep on your side if you find it challenging

Sleeping on your back during pregnancy may increase the risk of stillbirth
Sleeping on your back during pregnancy is a cause for concern for many expectant mothers. While some sources state that sleeping on your back during pregnancy may increase the risk of stillbirth, the evidence is mixed. Some studies have found a link between back sleeping and an increased risk of stillbirth, while others have found no association. One study of 800 women up to 30 weeks of pregnancy found no link between sleeping on the back and stillbirth. However, another study of women in their third trimester found that those who slept on their backs had an increased risk of stillbirth after 28 weeks.
The concern regarding back sleeping during pregnancy stems from the potential compression of blood vessels supplying the uterus and fetus. As the fetus grows, there is an increased chance of reduced blood flow to the uterus if the mother sleeps on her back. This can lead to dizziness, shortness of breath, or lower blood pressure in the mother. Sleeping on the side, particularly the left side, is often recommended as it allows for optimal blood flow to the heart, uterus, kidney, and baby. It also keeps pressure off the inferior vena cava, a major vein that returns blood from the lower body to the heart.
While the evidence on the link between back sleeping and stillbirth is inconclusive, many healthcare professionals recommend that pregnant women sleep on their sides, especially in the third trimester. This is because side sleeping has been shown to be the safest position for the baby and can help reduce the risk of stillbirth. However, some experts advise pregnant women to choose the sleep position that is most comfortable for them, especially during the first two trimesters.
If you are concerned about your sleep position during pregnancy, it is best to consult your doctor or midwife for personalized advice. They may recommend adjusting your sleep position or using pillows to support your body and alleviate discomfort. Remember, it is normal to feel uncomfortable as your body adjusts to new positions during pregnancy.
In summary, while sleeping on your back during pregnancy may increase the risk of stillbirth, the evidence is mixed and more research is needed. Side sleeping is often recommended to optimize blood flow and reduce potential complications. Consult your healthcare provider for personalized advice and support to ensure a good night's sleep during your pregnancy.
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Sleeping on your left side is often recommended for optimal blood flow
Sleeping on your side is generally recommended during pregnancy, especially as the pregnancy progresses. Sleeping on your left side is often suggested as it allows for optimal blood flow from the inferior vena cava (IVC), a major vein that carries blood back to the heart. As the fetus grows, there is an increased chance of compression of blood flow to the uterus, so side sleeping is recommended to maintain healthy circulation for both the mother and the baby.
While sleeping on the left side is recommended for optimal blood flow, sleeping on the right side is also considered acceptable. Some studies have suggested that sleeping on the left side may reduce the risk of stillbirth, but other studies have not found a conclusive link. Ultimately, the most important factor is maintaining healthy blood flow, so either side is generally recommended over sleeping on the back or stomach.
Pregnant women are advised to avoid sleeping on their backs, especially after 20 weeks, as the weight of the uterus can put pressure on the IVC and the aorta, potentially reducing circulation and leading to dizziness, shortness of breath, or lower blood pressure. Sleeping on the stomach is generally safe during the first trimester, but it may become uncomfortable as the bump grows, making side sleeping a more comfortable and practical option.
To make the transition to side sleeping more comfortable, pregnant women can use pillows for support. Pregnancy pillows or wedge pillows can be placed under the belly and behind the back to prevent rolling onto the back. Elevating the head of the bed or using a wedge pillow can help alleviate heartburn, and bending the knees can provide back support.
While side sleeping is recommended for optimal blood flow and to reduce potential complications, it is important to note that the choice of sleep position during pregnancy should ultimately be guided by comfort. Some experts advise pregnant women to choose the sleep position that is most comfortable for them, especially during the early stages of pregnancy. It is normal to feel uncomfortable when adjusting to a new sleep position, but given time, the body will likely adjust to side sleeping.
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Sleeping on your stomach is usually fine until weeks 16-18
Sleeping on your stomach is usually considered safe during the first trimester of pregnancy. However, as your bump starts to show during the second trimester, sleeping on your stomach may become uncomfortable. So, it is generally advised that you can continue sleeping on your stomach until weeks 16 to 18 of your pregnancy.
During the early days of pregnancy, your bump has not yet started to show, so sleeping on your stomach is usually comfortable and safe. As your pregnancy progresses, particularly after 20 weeks, sleeping on your back can become problematic. At this stage, the growing uterus can put pressure on the inferior vena cava (IVC), a major vein that carries blood back to the heart, potentially reducing circulation to both the pregnant person and the fetus. This can lead to dizziness, shortness of breath, or lower blood pressure.
Research has linked sleeping on your back with an increased risk of stillbirth, reduced fetal growth, low birth weight, and preeclampsia, a life-threatening high blood pressure disorder that affects the mother. However, the majority of these studies have focused on the position at the time of falling asleep, not the position during the night. Sleeping on your left side is often referred to as the "ideal" scenario during pregnancy as it allows for optimal blood flow from the IVC. It also helps your kidneys get rid of waste products and fluids from your body.
If you are used to sleeping on your stomach, you may find it challenging to transition to your side during pregnancy. To make the transition easier, you can use pillows to support your body. Try placing pillows under your belly, between your legs, and behind your back to keep you from rolling onto your back. Alternatively, you can try elevating the head of your bed a couple of inches with books or blocks, or use a wedge pillow to prop up your upper body at a 45-degree angle.
Remember, it's normal to feel uncomfortable for a few nights or even a few weeks as you adjust to new sleeping positions. Consult with your doctor or midwife if you have concerns or questions about which sleeping position is best for you during pregnancy.
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Sleeping on your side with a pillow behind your back can be comfortable
Sleeping on your back while pregnant can be dangerous, especially after 28 weeks. Research has shown that back sleeping can increase the risk of stillbirth, reduced fetal growth, low birth weight, and preeclampsia. Therefore, doctors recommend sleeping on your side during pregnancy, as it ensures optimal blood flow to the heart, uterus, kidney, and baby.
Sleeping on your side with a pillow behind your back can be a comfortable option for pregnant women. This position can help alleviate back pain and support your growing belly. The pillow can be placed in a V-shape or wedged behind the back to keep you from rolling onto your back. Additionally, you can use pillows under your belly and between your legs to provide extra support and keep your legs level.
Pregnancy pillows, such as a full-body pillow or a wedge-shaped pillow, can also help improve comfort when sleeping on your side. These pillows can be used to elevate the upper body, which is helpful if you suffer from heartburn. Using a donut-shaped pillow can also allow some women to sleep comfortably on their stomach, which is usually fine until weeks 16 to 18.
It is important to note that sleeping on your left side is often recommended as it allows for optimal blood flow from the inferior vena cava (IVC). However, there is no scientific evidence that the left side is better than the right, so feel free to shift from side to side to find what works best for you.
Overall, the most important thing is to find a comfortable sleeping position that works for you and provides the necessary support for your growing belly.
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There are strategies to help you sleep on your side if you find it challenging
Sleeping on your back during pregnancy can increase the risk of stillbirth after 28 weeks. Sleeping on either side can help give you and your baby optimal blood flow. Doctors recommend sleeping on your side, especially as your pregnancy progresses.
- Use pillows to prop your upper body at a 45-degree angle. This way, you're not flat on your back, and you reduce the compression on your IVC.
- Elevate the head of your bed a few inches with books or blocks.
- Use lots of pillows. Try crossing one leg over the other and putting a pillow between them and another behind your back.
- Get a special pillow. Try a wedge-shaped pillow or a full-body pregnancy pillow for extra support.
- Prop yourself up. If pillows don't help, try sleeping in a semi-upright position in a recliner.
- Slip a pillow between your legs to ease discomfort in your hips and lower body.
- Use an orthopedic knee pillow made of memory foam to keep your legs level and prevent pain.
- Make sure your mattress is firm so your back doesn't sag. If it's too soft, slip a board between your mattress and box spring.
- If you have long hair, try tying it in a low bun, which may make it uncomfortable to sleep on your back.
- Ask your partner to check on you and nudge you into a better position if you're concerned about your sleeping position.
- Seek a referral for physiotherapy to help with finding comfortable sleeping positions.
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Frequently asked questions
Sleeping on your back during pregnancy can put pressure on the inferior vena cava, a major vein that carries blood back to the heart, which may reduce circulation to both the pregnant person and the fetus. Doctors typically recommend shifting to a side-sleeping position during the second and third trimesters.
Previous studies have linked back sleeping with a higher risk of stillbirth, reduced fetal growth, low birth weight, and preeclampsia, a life-threatening high blood pressure disorder that affects the mother.
Sleeping on either side can help give you and your baby optimal blood flow. Sleeping on your left side is often referred to as the "ideal" scenario during pregnancy as it allows for optimal blood flow from the inferior vena cava (IVC).
You can use pillows under your belly, between your legs, and behind your back. You can also lie in a half-sitting position, propped up against some pillows, which can be helpful if you suffer from heartburn.









































