A.P.
My son didn't start sleeping through the night until around 14-16 month old, seriously. There was nothing wrong with him, he just wasn't a good sleeper. Then one day, bam he slept. I didn't do anything different...and believe me I had tried every sleep method, sleep training things I could get my hands on. My pediatrician said kids will sleep through the night when they are developmentally ready and there's very little parents can do to speed that up. Some kids sleep through the night at 6 weeks, some at 6 years. All is normal as long as you're giving him a good environment to sleep in.