There are many more complications in the “choice of motherhood” topic than the article explores, but it is a good and important article nevertheless. Open access.
Williams WM, Ceci SJ. When Scientists Choose Motherhood: A single factor goes a long way in explaining the dearth of women in math-intensive fields. How can we address it?. Am Sci. 2012;100(2):138–145. doi:10.1511/2012.95.138