The 4-month sleep regression leads to your baby waking frequently at night and/or taking short naps. This post will give you 20 crucial tips based on my 10+ years as a sleep consultant to get through this exhausting period in your baby's life. What is the 4 Month Sleep Regression? You probably just Googled 4 month sleep regression as thousands of people do each month. Working with parents every day, we know that many parents begin to have sleep problems when their baby is between 3 months