Most women experience incredible fatigue in the first few months of pregnancy. In my cars, this extreme fatigue alerted me to the fact that I might be pregnant. Being this tired when you already have kids is a nightmare and of course requires extra help from another parent if that's relevant.

Even if you have a fantastic pregnancy, you are getting bigger by the minute and this in itself takes some adjusting to.

At the end, most women can't easily manoeuvre (especially in and out of chairs, cars etc), nor can they pick up smaller children all the time. Any partner who thinks otherwise is just looking for an excuse not to pitch in.