We have written so much about sleep regressions here at The Baby Sleep Site®. SO MUCH. So so so so so much: 4 month sleep regression (and here and here) 8/9/10 month sleep regression 12 month sleep regression 18 month sleep regression (and here) 2-year sleep regression Now, there's a reason for all of these regression articles: there are no less than FIVE sleep regressions within your child's first 2 years of life. That is a lot of problematic,