We've come a long way baby. From morning sickness, to swollen legs, to the constant worry about her impending arrival, a mom-to-be has a lot to complain about. Hard as pregnancy may be today, it doesn't compare to having a bun in the oven several decades ago. As we saw on this week's Mad Men, times have changed, and luckily for us modern day mommas, so has pregnancy. Check out the major differences in pregnancy then, and now — and you may think twice about how hard you have it.