The 4-Month Sleep Regression: A Guide for Tired Parents

The Science: A Permanent Biological Shift

The 4-month shift is a total reorganization of sleep architecture. Newborns spend much of their time in a simple, two-stage sleep state. Around four months, your baby develops a complex "adult-like" structure, cycling through four distinct stages.

As they transition between these new cycles, they experience "partial arousals." Because their brain is now more alert to their surroundings, they may wake up fully between cycles. They are essentially learning to drive a new "sleep engine," and that takes time and patience to navigate.

Nutrition and the 4-Month Shift

During this period of intense growth, your baby’s caloric needs may shift. It is important to remember that many babies still biologically need nighttime feeds at this stage to support their development.

I am fully supportive of maintaining night feeds. Effective sleep support isn't about forced weaning; rather, it’s about ensuring that when your baby is asleep, they are resting deeply, and when they wake, you can respond to their true nutritional needs with confidence.

Looking Ahead

If you feel overwhelmed by the conflicting advice online, remember that every baby is unique. Whether you are looking for a gentle nudge in the right direction or a comprehensive plan to reclaim your family’s sleep, I am here to help.

Want to learn more? Book your 30-minute Sweet Dreams Starter Call today and discover how I can help your family enjoy the gift of sleep.

Yours in sleep,

Tracie / Rest Well Baby

www.restwellbaby.com

Tracie Kesatie is a Certified Gentle Sleep Coach dedicated to helping families with little ones 0-10 years of age achieve a restful night's sleep.

Disclaimer: This article provides general information and is not intended as medical advice. Always consult with your pediatrician for any concerns about your child's health.