Sleeping position during pregnancy 孕妇睡眠时的姿势
Pregnant women are being advised to sleep on their side in the last three months of pregnancy to help prevent still birth.
When a woman is lying on her back, the combined weight of the baby and womb puts pressure on blood vessels which can then restrict blood flow and oxygen to the baby.
A new study (MiNESS study) published in the British Journal of Obstetrics and Gynaecology (BJOG) last week showed that the risk of stillbirth doubles if pregnant women go to sleep on their backs in the third trimester.
Is waking up on your back a problem?
Prof Alexander Heazell, clinical director at the Tommy's Stillbirth Research Centre at St Mary's Hospital in Manchester, who led the research, advises women in their third trimester to sleep on their side for any episode of sleep, including daytime naps.
"What I don't want is for women to wake up flat on their back and think 'oh my goodness I've done something awful to my baby'.
"The question that we asked was very specifically what position people went to sleep in and that's important as you spend longer in that position than you do in any other.
"And also you can't do anything about the position that you wake up in but you can do something about the position you go to sleep."
Tips for going to sleep on your side
Put a pillow or pillows behind your back to encourage side-sleeping.
If you wake during the night, check your position and go back to sleep on your side.
Pay the same attention to sleep position during the day as you would during the night.
If you wake on your back during the night, don't worry, just roll on to your side.
The study didn't find a difference in risk between right or left side.