i had my 4 month checkup yesterday (i am actually 4 1/2 months, but whose counting?).
i weigh 17 lbs. 13 oz. and am 27 inches long. That puts me in the 50th percentile for heigth for 7 month olds and the 50th percentile for weight for 6 month olds. needless to say i am over the 90th percentile for heigth and weight for 4 1/2 month olds. you gotta be if your trying to learn how to crawl like i am.