This is really interesting - thanks everybody.
In our household, I work part-time and bring in probably 4/5 of the total income at the moment. I'm lucky in that respect - it's good pay for the hours I work.
I tend to do all of the day-to-day housework and childcare (obv apart from when DS is at nursery and I'm at work). I recently took on a cleaner because I was so sick of doing everything myself. However... while it is fantastic not to have to worry about the 'big cleans', this was the one time DH regularly helped. So it's made his life much easier but my day-to-day work load hasn't changed a great deal, if that makes sense (still have to do the washing/ironing/un/load the dishwasher, tidy and hoover after the whirlwind that is DS on a daily basis). Like primaballerina , every now and then we'll have an argument and he'll load the dishwasher or something and then it gets back to normal. Again, it's the same in that he does random DIY stuff which I suspect leads him to think that our workload is equally balanced.
When I first became pregnant this time, he made our dinner each night (he's a great cook) which was fab, but this seems to have petered out over the last week or so.
Rogers1 you asked what I was struggling with the most and it's currently the get-ups with DS. I'm 10 weeks pregnant, completely knackered trying to keep up with DS and not letting the house descend into chaos. But as always, it's assumed that I will deal with night-time wake-ups and early morning starts. If I do tell DH to get up instead, you'd think he was doing me the biggest favour in the world. I can count on one hand the number of times he's done it voluntarily over the last couple of years.
Tortoise I think your point sums it up really - that neither of you sits on your arse if the other isn't :) When I'm up and my day has well and truly started while DH has a lie in, or when I'm cleaning up all the toys in the living room while DH peers round me to watch the football, it's bloody annoying.
He's definitely not lazy, but I just don't think we've got the balance quite right at the moment. And there's never any allowance for if I'm knackered/pregnant/ill and struggling.