The Four Month Sleep Regression
As a professional sleep consultant, I hear the term “regression” used in regards to just about every imaginable circumstance.
Essentially, if your baby doesn’t sleep well for a couple of nights, parents start dropping the ‘R’ word.
Some people subscribe to the idea that there’s an eight month regression, a 9 month regression, a 1 year regression, as well as teething regressions, growth spurt regressions, and so on.