I've seen quite a few posts on here about breastfed babies, and I wanted to share my story with all those women who are struggling with the breastfeeding/weight gain issue.
My dd was born March 1 at 38 weeks. Her birthweight was 6lbs 2 oz. She left the hospital weighing 5 lbs 13 oz. She was very healthy, with very little to no jaundice, and we had very few problems with latch on and nursing. She seemed to "get it" right from the start. Anyway, at her first postpartum doctor visit, she had only gained about an ounce or so, and the doctor was concerned about weight gain, so she wanted to see us for weekly weigh ins to keep an eye on her weight. While my daughter stuck to the charts, and never fell off, she remained low (about 3rd percentile for weight) but she gained slowly (at least according to the doctor) at about an ounce a day, on average. Well, doc was really starting to get concerned about the weight gain, and first started mentioning formula supplementation in mid-April. I managed to put her off for a couple of weeks, when she mentioned it again. At that time, she suggested it again. I managed to put her off again, and promised to do things to work on my supply. To make a long story short, I was pumping at least daily (and for a couple of days, I was even pumping after every feeding, which was so ridiculous, I quit doing that). I just knew there was nothing wrong with my baby...she was latching fine, she had plenty of wet diapers (10+ a day) and 1-2 poops a day, and she was hitting her milestones. The next week, she still had not gained a lot of weight, and the doctor told me that if I didn't start feeding her formula, I would be depriving her of nutrients that she needed for proper development. Bottom line, the doctor didn't feel like she was getting enough calories from bf'ing. I finally broke down and went to the store for some formula. When I got home, I thought and thought about it, even had the bottles out and ready, and decided NO WAY was I going to give my daughter formula. So next week, at our weigh in, I told the doctor that, if she was so worried about my daughter's weight gain, we needed to see a GI specialist to evaluate for absorption problems. So, at three months, we saw the GI specialist. He did an evaluation, including a barium swallow, which came out absolutely normal, but still recommended we supplement with formula. Then, we saw an LC for the first time since dd's birth (we live in a very rural area). She did a before/after feeding weight, and we found out that dd took in about 2 ounces of bm, and this was after the barium swallow (she took about three ounces of that stuff). The LC tested my bm's calorie content, and found that it had more calories than formula. The LCs promised to talk to my doctors and tell them my dd was getting plenty of calories. Finally, end of issues with doctor! And, at almost six months, dd is doing wonderfully and is now at the 15th percentile for weight.
Hang in there, mommas! Breastfeeding is best, and you will get there! Babies grow at their own rate, and formula feeding won't change that.