Allan Kember is studying whether a belt intended to keep pregnant women from sleeping on their back will result in healthier infants, reports the Herald News.

The premise is that while a pregnant woman is on her back, the weight of her uterus presses down on veins that feed her heart and results in decreased blood flow back to the placenta and the baby, he said.

The belt is designed to subtly create pressure points that will naturally cause a sleeping woman to shift her position while sleeping.