Re: Help - Is my baby gaining sufficient weight?
What Vivsmaman said. There are plenty of babies who don't double birthweight by 6 months. What really matters is whether your baby is happy, healthy, and meeting her developmental milestones. According to this chart for breastfed babies: http://kellymom.com/images/growth/growthcharts.gif your LO is still nicely on the chart. She's slipped some percentiles since birth but that's okay- it's very common for a baby to follow one growth trajectory inside the womb and another on the outside. In fact, there's even a name for this phenomenon; it's called catch-up/catch-down growth. A lot of babies also drop percentiles in the 4-6 month window as they become increasingly mobile, devoting more calories to action and packing fewer on as fat.
I see no need for early solids or formula based on what you've described. First of all, solids typically do not increase the rate of growth. Second, formula is not more caloric than breastmilk; in fact, breastmilk generally contains slightly more calories than formula. The big difference between breastfeeding and formula-feeding is not how many calories the different foods have, but is in the feeding method. It's easy to overfeed a baby using the bottle, since bottles continue to deliver the same rapid flow of milk regardless of whether the baby is sucking for nutrition or comfort, and the baby must swallow or she will choke. Ad finally, you are doing just what you should be doing: you're feeding on demand, even though it means you're up a zillion times a night. That is the best thing you can possibly do for your supply and your baby's intake!
Coolest thing my big girl said recently: "How can you tell the world is moving when you are standing on it?"
Coolest thing my little girl sang recently: "I love dat one-two pupples!"