As DS2 had a misdiagnosed bowel abnormality, he was more comfortable on his front. Even in the big pram, he would insist on lying on his front. I had to keep the hood down so that he could do press-ups and look out the end. When he was 2, he had surgery and after that he could sleep any way he wanted. His brother always slept on his side, right from the start as that was how the midwives put him in the hospital.