I don't often post about the SAHM/working mother debate, because as far as I am concerned it is a totally personal choice.
I know that in my OWN case I am a better mother through going out to work full time. Personally, I would be climbing up the wall if I stayed at home all the time - and ds wouldn't be as happy either.
Dh and I both still have plenty of "quality" time with ds - from 6.45 to 8 in the morning (including a lovely snuggle in bed first thing in the morning as he has beaker of milk) and then from 5.30 to 8 in the evening. And the weekends are "his" We take pleasure in the time we spend with him - but we also appreciate the time we have we are out at work and, just as important, for each other once ds has gone to bed.
Also just as important - ds is happy. He runs into the childminder without a backward glance in the morning - and comes running out with a big hug in the evening. He has been going there since he was 4 months old (he's now 2) and as a result of the contact with the other kids (which he would not otherwise have got as I'm an older Mum with few friends locally with young kids) he is a confident, sociable and adaptable child. I am honestly not the sort of mum who could spend all her time playing with her child, getting out the play dough and the paints etc. I can cope with (and enjoy!)) for short periods at the weekends and in the evenings - but not for much longer periods!
I am loving watching him growing up - and certainly do not feel that I have abdicated that responsibility to someone else. I (or rather we, dh and I) make all the decisions about what he eats, when he goes to bed and gets up, how he should be disciplined (not really an issue at this stage - more a case of encouraging certain behaviours), whether we take him swimming, to the park?. everything except playing with other kids during the day during the week. To my mind, that is not letting someone else bring him up.
Some things have had to go, of course. I used to go running, but at the moment my time with ds in the evening is too precious, so as I am a slug that hates getting out of bed in the morning, and after 8 is too late to go for a run (it's not really, but it's a good excuse), for the moment I've stopped running. (Instead, I'm going to start cycling in to work - good for the environment!). I do miss not being able to take him to Tumbletots and things like that (although I have found out about a local baby swimming class at 9 on a Sunday morning).
In "olden" days, mums would have had to work - out in the fields or whatever. Babies would have been strapped to backs (as they still are in the Third World), but as soon as they are more mobile, would have been left in the care of the extended family - such as older kids, grandmothers or aunts. It is only in our more affluent society that we have the luxury of being able to stay at home. And it could be argued that with the advent of the nuclear family, childminders and other such forms of support are the modern day equivalent of the extended family.
I emphasise again that this is OUR choice and in our case we believe that we have done the best by both our ds and ourselves, given our and his characters. Ds is very much part of our lives - but not the ONLY thing in them.