Dr. Heyu Ni, St. Michael's Hospital (IMAGE) St. Michael's Hospital Caption "Our research challenges the idea that low platelet counts are responsible for fetal brain bleeds and instead shows that the immune system's attack on the new blood vessel cells in the brain are more likely responsible," said Dr. Heyu Ni, a scientist in the Keenan Research Centre for Biomedical Science of St. Michael's Hospital. "An antigen, called beta 3 integrin, is found both on platelets and on the cells responsible for developing blood vessel in fetuses." Credit St. Michael's Hospital Usage Restrictions Provide attribution License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.