Yes, I tried with both of my kids -- and no, it didn't work. Both times I just didn't get the supply I needed. My son (first baby) had failure to thrive after two months, so we switched him to formula with as much breast milk as I could produce (which wasn't much, and it was sadly lacking in calories). For my daughter, I didn't let it go that long. I was in better health and thought I might be able to breastfeed this time, but after a couple of weeks she, too, started to lose weight, so she gets formula now too.