A gentle guide to sleep regressions support: 15 Month Sleep Regression: What to Expect

If your 15-month-old has suddenly started resisting naps or waking more frequently at night, you might be experiencing the 15 Month Sleep Regression. This phase, while challenging, is a normal part of your toddler's development. As experts in the Gentle Night Method, we're here to guide you through this period with warmth, reassurance, and attachment-safe, responsive settling strategies.

15 Month Sleep Regression: What to Expect 15 Month Sleep Regression: What to Expect and How to Navigate it Gently As a parent, you've likely celebrated countless milestones with your little one – first smiles, first steps, and perhaps even the joy of a full night's sleep. Then, seemingly out of nowhere, sleep patterns shift, bedtime battles emerge, and nighttime wake-ups become the norm. If your 15-month-old has suddenly started resisting naps or waking more frequently at night, you might be experiencing the 15 Month Sleep Regression . This phase, while challenging, is a normal part of your toddler's development. As experts in the Gentle Night Method, we're here to guide you through this period with warmth, reassurance, and attachment-safe, responsive settling strategies. What Exactly is a Sleep Regression? A sleep regression is a temporary period when a baby or toddler who has previously been sleeping well suddenly experiences disruptions in their sleep patterns. These disruptions can manifest as increased night waking, difficulty falling asleep, shorter naps, or early morning wake-ups. While the term “regression” might sound alarming, it’s often a sign of significant developmental progress. Sleep isn’t truly going backward; rather, your child’s brain and body are busy learning and growing, which can temporarily impact their ability to settle and stay asleep [1]. Why Does the 15 Month Sleep Regression Happen? Understanding the Triggers The 15 Month Sleep Regression is unique because it often coincides with a flurry of developmental leaps and changes in sleep needs. Unlike the 4-month regression , which is neurological, or the 8-month regression , which can be physiological, the 15-month regression is primarily driven by cognitive and physical advancements, alongside evolving nap requirements [2]. [create a daily schedule](/sleep-schedule) [upcoming sleep regressions](/regression-predictor) [sleep schedule printable](/free-printables) Major Developmental Milestones Around 15 months, toddlers are rapidly acquiring new skills. They might be: Walking independently: The newfound freedom of mobility can be exhilarating, leading to a desire to practice these skills even when they should be sleeping. Increased language development: Your toddler is absorbing and attempting to use new words, leading to a busy brain that struggles to switch off at bedtime. Cognitive growth: Problem-solving skills are emerging, and their understanding of the world is expanding, which can lead to an overstimulated mind at night. Imitation and independence: Toddlers at this age love to imitate adults and assert their independence, which can sometimes translate into resisting sleep routines. The One-Nap Transition One of the most significant factors contributing to the 15 Month Sleep Regression is the transition from two naps to one. While some toddlers make this shift closer to 12 months, many are ready between 15 and 18 months [3]. If your little one is still taking two naps