Except carrying a baby and having adaptable pelvic bones is not at all comparable to experiencing combat.
Below is a link to an enlightening article by a female Marine captain; she details the weakness of her body compared to that of the men she served with, and how it started to break down.
From the article: "It was evident that stress and muscular deterioration was affecting everyone regardless of gender; however, the rate of my deterioration was noticeably faster than that of male Marines and further compounded by gender-specific medical conditions.
I understand that everyone is affected differently; however, I am confident that should the Marine Corps attempt to fully integrate women into the infantry, we as an institution are going to experience a colossal increase in crippling and career-ending medical conditions for females."
http://www.mca-marines.org/gazette/article/get-over-it-we-are-not-all-created-equal