Projected Rate of Multiple Births (IMAGE) Brown University Caption The observed rate of multiple births per 1,000 live births from 1971 to 2016 and the fractions that can be attributed to delayed childbearing and assisted reproductive technologies, projected out to 2025. Credit Brown University Usage Restrictions None 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.