My partner and I both have a long-term history of depression, and we were both on ADs when I conceived DD. I did stop taking my Citalopram as I was on a v low dose at that point and wanted to see if I could cope without it. As it happens, pregnancy was a really positive experience for me and my general underlying mood was much better. I would have gone back on them whilst pregnant if I'd needed to though.
Parenthood is challenging, no doubt about it, and I was terrified that I would get PND. I certainly had a moment at about six weeks in (lack of sleep made me feel very low) but I spoke to my GP about it and my partner, and we got through it. I've now been AD free for almost three years. I had a wobble this winter when I had a mc, and I have an 'emergency' box of ADs stashed away, but on the whole I am ok.
What I did find was that having a child pulled me out of myself and my worries and concerns, I certainly have less time to dwell on things. I was desperate to be a mother, and waited a long time for her. So whilst I will always have depression (I just don't have the mechanisms to cope with certain things) having her was a great decision. I know that it's not the same for everyone, and I am lucky in that I haven't suffered badly from anxiety since my twenties.
I couldn't have done any of it without my partner being fully on board and supportive, we keep an eye on each other's mh, and that is invaluable. We do worry a little bit about our daughter suffering from mh problems in the future, but tbh that can happen to anyone, and at least we both know what to look out for (unlike our parents who were of the 'stiff upper lip' 'depression is a self indulgence' generation). She is a ridiculously happy and sunny child though, so maybe she'll breeze through life.
If it is something you really want, and you have good support around you, I would go for it.