That does actually concern me a little. I wouldn't want to deliver a baby with a big head and shoulders, (OUCH!) but a baby should have a good amount of body fat! They can't shiver to stay warm, and their brains are still developing. They need some fat.

Also, is there any proven relationship between birth weight and childhood obesity? I have to think that diet and lifestyle are going to be the biggest factors in determining whether your child is obese. If you give them a low GI diet in later childhood, I imagine they will be a healthy weight, but I don't think that a strictly low GI diet is healthy for an infant/toddler, with their short little bowels, or that simply eating low GI in pregnancy and having a lower birth weight baby will determine whether he/she is obese in childhood.