DUH?  I can hardly believe that someone did a study of this.  Who does not know that women are more likely to get up at night to care for a young child?  The interesting fact here is that it does not matter who is primary breadwinner.  I wish I understood why findings like this are so common, so persistent.  Session 3 of Turn the Page (http://www.rolereboot.org has lots of discussion of how to think about what is biology and what is merely role.

Read More::  http://www.washingtonpost.com/wp-dyn/content/article/2011/02/14/AR2011021404939.html