Certainly they can change diapers, wash the baby, feed the baby and carry it around as well as a woman can.
But really in this game are the women even doing that? To me it seems more goofy than anything, seriously, watch her take the trash out or read the paper, it's like the bundle of baby isn't even there.
That's no offense to the designers, I personally love how things are so goofy about it, like the over romanticized 'trying to make a baby' if anything should strike anyone as sexist, it should be that right there. Again, not saying I think it is, like I said, I love the goofyness, it's like old episodes of I Love Lucy and things of that nature.
We are mostly adults here (don't know the ratio, so I'm guessing) and we know the difference between make believe and real life, and the children that do play it, I'm sure they'll see things the way I see them, as goofy little quirks to an awesome game. And if they don't, or their parents don't and feel it inappropriate, well then they are adults and they know how to make the decision for their child.