Question: how do you know if your baby is having a growth spurt?
Answer: Your baby will be up more often at night. Even if your baby was sleeping for a blissful 5- or 6-hour stretch, during a growth spurt he'll howl for a midnight snack, then one at 2 a.m., and 4 a.m., and so on. You may find your older baby waking up earlier from his naps, too.