Women's enrolment in graduate science and engineering in the United States is growing more slowly than men's, and the disparity is widening, according to a study. The US National Science Foundation and National Institutes of Health's 'Survey of Graduate Students and Postdoctorates in Science and Engineering', released on 2 June, found that men's enrolment grew by 2.9% from 2007 to 2008, whereas women's rose by just 2.1%. From 2006 to 2007, women's enrolment rose by 3.4% and men's by 3.2%. However, although just 34.2% of postdocs in the field in 2008 were female, the number grew by 12.9% from 2007 to 2008, versus 2% growth for men.