I'm not writing this out of any sort of pique - I just think this is an opportunity to think 'outside the box'.

Your wife's (very unfortunate) experience is not typical - most women won't require two months of bed rest.

Let's consider people with depression: most will perform their jobs normally, while some will require months of medically-mandated time off. Should employers discriminate based on the possibility to develop depression? I'd say it's far more likely than becoming pregnant if one accounts for the entire workforce.