Sex-specific organ characteristics (IMAGE) Heidelberg University Caption Surprising pattern: The genetic programmes responsible for the development of sex-specific organ characteristics in mammals are turned on almost exclusively late in the development of the organs, in puberty. Credit Leticia Rodríguez-Montes Usage Restrictions This image may be used only in connection with the contents of this press release, and the source of the image must also be cited. License Original 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.