Baby Sleep Regression: Why It Happens and What to Do
A practical, reassuring guide to surviving and solving sleep regressions, from the 4-month leap through the 18-month transition—without losing your sanity
by Alumigogo Books
non-fiction
Wondering why your baby suddenly won't sleep? This warm, practical guide walks you through every sleep regression from 4 to 18 months with age-specific plans to get everyone sleeping again.
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About this book
Your baby was sleeping through the night. And then, suddenly, they aren't. Is it a growth spurt? A new tooth? Are you doing something wrong? Probably not. It's likely a sleep regression—a temporary, completely normal phase where your baby's sleep temporarily falls apart as their brain and body go through a major developmental leap. This book is here to help you navigate these inevitable hiccups with confidence and good humor, without turning your home into a battlefield.
Written in the warm, reassuring voice of an experienced pediatric nurse, this guide doesn't just tell you 'it's a phase'—it shows you exactly what to do about it. You'll learn the eleven specific developmental leaps that cause regressions, how to identify which one you're dealing with, and then get a step-by-step roadmap for each age. We'll cover how to adjust your baby's schedule, tweak their sleep environment, and handle the middle-of-the-night wakings in a way that feels supportive for both of you. From the 4-month nap shift to the 18-month separation anxiety surge, you'll have a plan ready before the next regression hits.
But this isn't a one-size-fits-all checklist. You'll get scripts for comforting a defiant toddler, options for different sleep-training approaches if you need them, and a clear, no-nonsense guide to knowing when a sleep problem is actually a medical concern that warrants a call to your pediatrician. This isn't a replacement for professional medical advice, but it's the supportive, informed companion you need to survive the sleepless nights and emerge with your confidence and your sanity intact.
Reader Reviews
Melissa Wilson
★★★★★Our 18-month-old was suddenly screaming bloody murder at bedtime, and I was losing my patience. This book's chapter on that age was exactly what I needed. The part about understanding it from his perspective was huge. I stopped fighting him and started working with him, and within a week he was back to sleeping through the night. I'm recommending this to every parent of a toddler.
Susan Nelson
★★★★★I was at my absolute breaking point with my 4-month-old waking every 45 minutes. This book felt like a friend handing me a flashlight in the dark. The explanations for why she was sleeping so badly just made total sense, and the step-by-step plan for her age was a lifesaver. We saw improvement in just three nights. It's the most empathetic and practical parenting guide I've ever read.
Mary Thompson
★★★★★Honestly, this book is a godsend, but I wished it had a bit more on the 6-month regression specifically since that's where we hit our wall. The sleep training modifications were helpful, but the sample routine didn't quite match our early riser. Still, the tone really helped me stop blaming myself, and the nap rescue techniques did the trick eventually. A solid, sensible resource.
Timothy King
★★★★★This is the first parenting book that didn't make me feel like a failure. I know a lot of this stuff intuitively, but when you're sleep-deprived, your brain can't think straight. Having the exact scripts and a clear checklist for what to rule out before 'fixing' anything was invaluable. We survived the 9-month regression without losing our minds, and I have this book to thank.
Joseph Garcia
★★★★★There's some good information here, but it wasn't as revolutionary as I'd hoped. A lot of the advice, like consistent routines and checking for teething, I'd already read online. The 'scripts' felt a little stiff to say out loud. However, it did gently push me to be more consistent, and that alone made a difference. So it's a decent reminder, just not a game-changer.
Kevin Flores
★★★★★Really solid, level-headed advice. I appreciated that it wasn't preachy or dogmatic about sleep training. It presented different options in a non-judgmental way and helped me figure out what felt right for our family. The chapter on coping with exhaustion was also a nice touch because I had forgotten to take care of myself. It's a bit long to get to the 12-month section, but the index helped me jump right to it.
Ashley Nguyen
★★★★★When my daughter's sleep fell apart at 8 months, this was the only source I trusted. The scientific explanation about the developmental leap is so reassuring, and I loved that it gave me concrete things to try based on whether she was crawling or pulling to stand. The feeling I got from the author is that she has literally been through this with a hundred families. A total calm in the storm.
Sarah Flores
★★★★★It's a lot of good information, but it can feel a bit overwhelming when you're already exhausted. I didn't read it front to back, just jumped to the 9-month chapter. It helped me understand the nap strike, which was huge, but the advice didn't work completely for us. I had to tweak a lot. Still, I'm glad I read it because it gave me a starting point and stopped me from making random changes.