We all hear about the dreaded sleep regression. This is the term that is used to describe an interruption in the sleep habits of a child who is otherwise a happy sleeper. Sleep regressions typically happen at or around 4 months of age, between 9 and 11 months, and then again at 18 months. It doesn’t always happen with children who are strong sleepers, but even the best sleepers can struggle with sleep around these times. For this post, I’m going to talk specifically about the 18-month sleep regression.