You're excluding women who are not straight but want or are having children! Seriously though, I find the post you replied to to accurately distinguish between women and mothers. The women who are not bearing are included in those numbers! If we peg the share of women who don't have children at ten percent the child-per-women number of 2 means a child-per-mother ratio of around 2.2. It doesn't change the argument and is an unnecessary detail.

(I disagree with the thrust of the post and think that letting mothers participate in society outside home an important factor in female empowerment. But please let's talk about that, not haggle over definitions.)