Is Sleeping on Your Back in the Third Trimester Safe?
Sleeping on your back during the third trimester of pregnancy can pose a risk to both you and your baby. As your pregnancy progresses, your baby grows and moves, and your body undergoes significant changes. While it may be tempting to sleep on your back, it's essential to understand the potential risks associated with this sleeping position.
The Risks of Sleeping on Your Back During the Third Trimester
- Compression of the vena cava: Sleeping on your back can cause the vena cava, the main vein that carries blood from your lower body to your heart, to become compressed. This can lead to a decrease in blood flow to your heart and baby.
- Stillbirth: A 2017 study suggested that sleeping on your back during the third trimester may increase the risk of stillbirth. However, experts have questioned the reliability of this study.
- Back pain: Sleeping on your back can cause strain on your back muscles, leading to discomfort and pain.
- Insomnia: The discomfort and anxiety associated with sleeping on your back can make it challenging to fall asleep or stay asleep.
Safe Sleeping Positions During the Third Trimester
Sleeping on your side is considered the safest position during the third trimester. This position helps prevent the weight of your uterus from compressing vital blood vessels and allows for maximum blood flow to your baby. Here are some tips for sleeping safely on your side:
- Use a pillow between your knees to take pressure off your hips and lower back.
- Place a pillow under your belly to support your growing uterus.
- Experiment with different pillows and positions to find what works best for you.

Other Tips for Sleeping Comfortably During the Third Trimester
While sleeping on your side is the safest position, there are other ways to improve your sleep quality during the third trimester:
- Get comfortable: Use pillows and position yourself in a way that feels comfortable and supportive.
- Worry time: Schedule time during the day to address any anxiety or worries, rather than letting them keep you up at night.
- Massage: Consider getting a massage to help relieve back pain and improve sleep quality.
- Nursing sleep bra: Wear a nursing sleep bra to provide gentle support and comfort during the third trimester.
Conclusion
Sleeping on your back during the third trimester is not recommended due to the potential risks associated with it. Sleeping on your side is considered the safest position, and there are several tips and tricks to help you get comfortable and improve your sleep quality. By prioritizing your sleep and taking steps to alleviate discomfort, you can promote a healthy pregnancy and prepare for a restful postpartum period.