Researchers from Institute for Primary Care and Health Sciences Keele University with the University Hospital of North Midlands Trust (UHNM) the University of Arizona and the University of Leicester looked at 21 studies and over five million women to come up with the analysis that premature birth of the child doubles the risk of heart diseases in the mother. The findings published in the Journal of the American Heart Association said that premature birth (delivery before 37 gestational weeks) affects 10 per cent of all pregnant women and is linked to poor health of premature babies. In addition to that