A Family History of Infertility (IMAGE) University of Pennsylvania Caption A family pedigree provides support for a TEX11 mutation causing infertility, passed down the maternal line. Two brothers both had azoospermia, the mother was heterozygous for a mutation, and the brother's two maternal uncles were childless. Credit University of Pennsylvania Usage Restrictions In context of reporting 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.