Ive just qualified as a medic after having my 2 during med school.
I am lucky enough that my hubby earns enough for us to be housed and to eat. My parents helped out with childcare (you can get 85% of it paid for you, but he earnt over the threshold).
It was a bit of a struggle at times, but I didn't take any time out and pushed on through. So now where most people are struggling to pay the bills, we've upped the income by £20k, just by me starting work!
For us and our circumstances - it definatley worked for me. I'm glad that I have done what I wanted to do and that I have family at the end of it too (if I'd have waited, who knows how old I'd have been when I started) (and, as ever, there is never a right time to start a family!)
Good luck!