Maternal Balancing Act (IMAGE) Cincinnati Children's Hospital Medical Center Caption This illustration outlines the delicate physiological balancing act a mother's immune system must pull off to prevent a fetus from being rejected by the body. A new study in Cell Reports from Cincinnati Children's researchers indicates the processes work differently in first and second pregnancies. Credit Cincinnati Children's Usage Restrictions Please credit Cincinnati Children's 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.