I find this with SOME people who are pregnant.

We have a girl at work who is pregnant (due 3 weeks before me). The way I see it - she made the choice to keep this baby, so now instead of complaining and milking it for EVERYTHING (and when I say everything i'm really not exaggerating - things like not going to a christmas lunch put on by work in an aircon venue because "it's just too strenous ) she needs to take responsibility to her choice and take the good with the bad. Yep- having a baby is an AWESOME experience, yes - we get tired when we are pregnant, yes- the heat makes us feel 10x worse, yes - we get a sore back/tummy and anything else but as I said, you made the choice now deal with the responsibility and the consequences (good and bad) that come with this.
Yes - I know I occasionally complain about how much i'm aching, or how the heat is affecting me,but you know what - I also take responsibility for the choice i made to have a baby, suck it up and keep going.

Having a baby is a privledge not a right - but hey - thats just how i feel about it.