In this third instalment in the series on Women in Science and Engineering in Canada, a review of some of the available statistics on women in the natural sciences and engineering (NSE) is presented. [...] Section 2 of this report summarizes standardized test results in mathematics and science and examines the supply side of women in science and engineering through the education stream and immigration. [...] PAGE 3 1. Introduction The under-representation of women in the various fields of natural sciences and engineering (NSE) has long been recognized and is of concern to the Natural Sciences and Engineering Research Council of Canada (NSERC). [...] From pre-university to post- graduation, the participation of girls and women and of boys and men in science and engineering education and careers is highlighted. [...] The data provide insight into the magnitude of the problems along the educational pathway and in the science and engineering workforce, with a focus on research careers and funding in the NSE.