What is the average time that 7 month olds stay up? she is fighting to stay up for up to 4 hours at a time sometimes and other times it's 2 to 2 1/2 hours. 2 1/2 hours has been average for the first UP time but this morning and many other mornings and/or afternoons....she realllllly fights it and I end up spending an hour and half trying to get her to sleep which is VERY hard with 2 year old around and than of course when she stays up that long, she either naps for a VERY short time because she wakes up because it's time for her next bottle OR she insists on having her next bottle before she goes back down. She has solids breakfast, lunch and supper and has bottle every 3 to 4 hours usually on average.