I just brought my dd to her 4 month check up Friday and the doctor, upon noting that she hadn't gained much since her 2 month check up, suggested starting solids, and when I said, but I thought before 6 months wasn't good (and I cited allergies, immature digestive system) he said that that's what he thought too but very recent studies, especially two in 2008, show that actually it's not that bad, the connection to allergies has been disproved, and that starting at 4 months is OK, though not before 4 months. He didn't push it hard but said to think about it, and that he wants to weigh her at 5 months instead of waiting to see her at 6 months. He is a doctor who is actually supportive of bfing (as opposed to the lip service only I've encountered) and his mother is a lactation consultant, so I was surprised. I only add this because I was so surprised and it just happened. As a side note I am not going to start her on solids right away, but am weighing what this doctor just said and whatever else I can find on the subject. I'd like to read more about these studies, for example. My baby is not gaining weight so quickly--only a pound and 10 oz in two months, but is the picture of health otherwise, so it's puzzling.