Language protein differs in males, females

http://medicalxpress.com/news/2013-02-language-protein-differs-males-females.html

Here are details of a fascinating piece of work that showed that FOXP2 protein was elevated in the brains of baby male rats, compared to females, and resulted in more effective ultrasonic distress calls from males to their mother, resulting in her preferential care and retrieval of them to the nest. When researchers manipulated the levels of FOXP2 protein in female pup brains the situation was reversed. This work builds on a previous small study in humans which suggested that girls have higher levels of FOXP2 protein that boys in parts of their cortex associated with speech which might help to explain relative language delay in boys.