It is very common for your 8, 9, or 10 month old to be having sleep problems, not be sleeping well at night, or taking short naps. Maybe the sleep problems are new after your baby was sleeping through the night? Or maybe you feel like you never quite recovered from the 4 month sleep regression. This article will discuss what exactly is happening with your 8, 9, or 10 month old baby. When Does The 8 Month Sleep Regression Happen? What About the 9 Month Sleep Regression or the 10 month? The