Before I had kids I had a 'career' (which was incompatible with children, really), then I got made redundant after maternity leave no 1 - oh I wonder why that was?!!
I then became a SAHM in a different more conservative country (with a small c, other policies were far more liberal around environment, public transport and taxation) as DH got offered an amazing job just when I'd been made redundant. Those were the best years of my life. Mothering was actually valued in that country, the wellbeing of children put first. DC1 and I used to travel, do wonderful things it was completely amazing.
Then I came back to the UK, by which point DH's career had progressed to the point I can never catch up financially, so I ended up doing a job I don't particularly love for its flexibility. I earn 38k half time - so take home half that - this means I can do all school drops and pick ups, all clubs, I manage the household entirely. DH jokes he makes the money and I spend it, but he's not at all interested in dental appointments / buying uniforms / organising clubs etc. The mental load of our household is entirely mine.
Do I regret this? Yes. Am I unfulfilled in my work? Most definitely and at times I find it soul destroying and hate it. However, on the flip side, I have two very well adjusted kids that I get/got to spend time with.
I've got several good degrees and very good qualifications, partly funded by the state, which I am now not using at all - it's a waste but I've tried several times for other opportunities - jobs very similar to that I left at my first mat leave and I don't know if it's age or the obvious fact I'm a mother but I don't even get interviews for jobs more junior to that I used to do, successfully.
I didn't get to choose this, as was made redundant but also I did love the time with my little ones. It was immensely rewarding. I know DH felt he missed out on certain things.
In the UK I don't think having it all is possible for women. In the country we lived in for several years, there is an expectation a parent will take time out until about age 7 so the returner programmes are a lot better. I wish we still lived there, not least because the unpaid work I did and still do is so much more highly valued. The reason we came back was really to do with elderly parents and also language related but I think we'd have overcome that with time.
I also know several women who have tried to stay in professional jobs whilst picking up the slack with the kids (not earning quite enough for a nanny) who are close to a nervous breakdown. I know two who became disabled IMO because they were doing this (obviously it's impossible to know for sure), so now they don't have the option anymore.