S.R.
I've heard there is an 18-month sleep regression, which I am SO upset about since my LO just hit that mark. Apparently it is very common and is related to developmental issues. Lots going on in their little brains. But from everything I read, it just passes usually after 2 or 3 months. But I think their knowing how to go to sleep on their own is very important, especially at this age. They are becoming more defiant and willful, and you have to be able to put them to bed and walk away. And if you start bad habits during these periods, they are super hard to break. So stick with a routine and keep him in his bed at all costs!