I don't really remember the exact time with my first living child (maybe after 4 days following my c/s stay?), but I do remember it taking a while b/c my daughter screamed bloody murder b/c she was hungry and lost weight below the threshold. It got really bad to the point where they gave her formula (which I was furious about not b/c I wanted her to exclusively nurse BUT b/c the nurses didn't ask much less even tell me) since she was starved. I panicked then (being my 1st child) b/c I didn't think my milk would come in at all and that I would not be able to feed my baby.
I do remember the lack of sleep b/c the nurses would shuttle my daughter in like what seemed every couple minutes for me to feed her, the incredible soreness in my arms in trying to learn to hold my baby for nursing and avoiding my painful incision plus the intense pain rock hard boobs I got the night at home once my milk came in.
Oh yeah, and having nipples that felt like they were on fire after a couple of days.
Yet, I gave her nothing but BM for food until a few days past her first birthday all while working full-time! What an experience!
Re: How long until your milk came in?
Mine came in on the third day after birth.