Ken. R. Smith, University of Utah (image) University of Utah Share Print E-Mail Caption University of Utah demographer Ken R. Smith led a new study confirming that women who have their last baby after age 45 live longer than women who have their last baby at younger ages, and also showing that their brothers live longer too. That suggests the same genes promote both prolonged fertility in women and longevity in both sexes. Credit Jason Smith, University of Utah Usage Restrictions None Share Print E-Mail 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.