the increased chance of still birth is tiny, the study also found that if you didn't get up to wee more than once in the night your risk was also increased, however biggest risks remain weight and lifestyle habits,
In an accompanying editorial, Lucy C. Chappell, PhD, clinical senior lecturer in maternal and fetal medicine, King's College London, United Kingdom, and Gordon C.S. Smith, MD, PhD, professor and head, Department of Obstetrics and Gynaecology, University of Cambridge, United Kingdom, said the study results are not strong enough to warrant a forceful campaign urging pregnant women to sleep on their left side.
"Although the message for mothers to sleep on their left is probably harmless and may be helpful, this study should be seen as one that only generates a hypothesis that needs validation."
the study itself took 156 women who had had a stillbirth and 300 who hadn't and asked them a series of question one of which was what side did you sleep on.