12-Month Sleep Regression: Causes, Signs And Tips To Handle It


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Babies grow constantly, and it affects all aspects of their lives, including sleep. A 12-month-old is on the verge of achieving several developmental milestones, which may affect their sleep.Many 12-month-olds who slept through the night may struggle to fall asleep or wake up frequently at night. This event is called sleep regression.

The 12-month sleep regression may cause inconvenience to parents who would have grown used to their baby sleeping through the night. Thankfully, it is a temporary phase, and the baby’s sleeping patterns become predictable eventually. Read on to learn more about the 12-month sleep regression, its causes, and ways to manage it.

What Is 12-Month Sleep Regression?

The 12-month sleep regression is defined as an event when the baby displays a regressive trend in their nighttime sleep routine at or around the age of 12 months (1). Most babies sleep through the night as they grow older and could have 11 hours of nighttime sleep by 12 months (2). However, around or after the baby’s first birthday, parents may notice that the child wakes up frequently from sleep and struggles to fall asleep at bedtime. The baby may also grow restless when placed on the bed for sleep. These events are indicative of sleep regression.

Sleep regression occurs at multiple ages during infancy and toddlerhood, such as at the ages of four months, six months, and eight months. Some babies may display 12-month sleep regression after attaining the age of one year or anytime between the ages of nine and 11 months.

How Long Does 12-Month Sleep Regression Last?

Sleep regression is a spontaneous phenomenon, but it is temporary. In most babies, the 12-monthsleep regression subsides in two weeks. Sleep regression may depend on several factors, such as the baby’s sleep environment. Therefore, depending on the factors, sleep regression may last up to six weeks in some babies (3). If 12-month sleep regression extends beyond six weeks, consult a pediatrician.

What Causes 12-month Sleep Regression?

The 12-month sleep regression is likely the result of the rapid growth and development that babies display at the age of 12 months. A 12-month-old will develop several essential skills, such as walking with support and saying simple words (4). The multiple changes in the body may affect body functions, including sleep.

The following are the various 12-month developmental milestones that may lead to sleep regression (5) (6) (7).

  1. Walking: Babies display high mobility around or after their first birthday. They pull to stand and walk with support. The newfound excitement to explore may cause sleep disturbances.
  1. Talking: A 12-month-old can say simple words and can respond to questions. You may observe them babbling, yelling, and even uttering small words or sentences, and these activities may carry on even during bedtime.
  1. Separation anxiety: A baby at 12 months is likely to display emotional attributes, such as nervousness around strangers and anxiety when parents leave. Separation anxiety peaks between the ages of 10 and 18 months. It may make it difficult for the baby to fall asleep when a parent is not in their line of sight. A 12-month-old who wakes up at night may not fall asleep again unless comforted by a parent.
  1. Change in daytime naps: By the age of 12 months, babies usually nap less frequently during the day. A 12-month-old is likely to nap for three hours during the day. The change in the total hours of daytime sleep may influence the nighttime sleep, causing the baby to develop sleep regression.
  1. Teething: The teething phase is marked by sore and inflamed gums. It can cause the baby to become irritable and also disrupt their sleep.

What Are The Signs Of 12-month Sleep Regression?

The signs of 12-month sleep regression may vary among babies. The following are the common signs of sleep regression that parents may observe in their 12-month-old (1).

  • Difficulty in falling asleep at bedtime.It is the most common sign of sleep regression. Babies may find it difficult to fall asleep and appear excited or energetic instead of calming down before bedtime. Some babies may cry and throw a tantrum if repeatedly coaxed by the parents to sleep.
  • Fussiness after waking up at night. The awakened baby would find it difficult to fall asleep and would act fussy. They may also display clinginess and would only sleep when held by a parent.
  • Longer daytime naps. Sleep regression may cause the baby to become sleep deprived, causing them to have longer daytime naps. Too much sleep during the day may make it difficult to sleep at night, thus causing a repeated sleep regression cycle. 

Tips To Manage 12-month Sleep Regression

You may try the following tips to manage sleep regression and help your baby sleep better (8) (9).

  • Track your baby’s sleep patterns. Parents should keep a log of their baby’s sleeping schedule, including daytime naps. Any changes in the sleep patterns can help identify the triggers and let you tackle them before the onset of sleep regression.
  • Keep them active during the day.Parents should engage their babies in more daytime activities. These activities should be mentally and physically stimulating for the baby, so they can tire themselves to sleep at night.
  • Maintain a fixed sleep routine. Place the baby to bed at the same time each night. Also, maintain fixed timings for daytime naps. It will help prepare the baby’s body for sleep. You may also observe a nighttime practice, such as a bath or reading a book, which can signal the baby that it is time to sleep.
  • Avoid sudden changes in sleep routine. Once you establish a sleep routine for your baby, avoid making changes to it. If you expect disruption in your baby’s sleep patterns due to an activity, such as traveling, plan your baby’s daytime and nighttime sleep timings beforehand.
  • Feed your baby adequately. Make sure the baby is sufficiently fed during the daytime to avoid any late-night hunger pangs.
  • Manage separation anxiety. Comfort your baby to sleep in their crib and leave the room only when they have fallen asleep. If the baby develops sleep regression before the age of 12 months, you can consider room sharing up to the baby’s first birthday. Placing the baby’s crib in the same room as the parents can help them fall asleep sooner after nighttime awakenings.
  • Try soothing methods.Place a night lamp in the baby’s room so that they do feel scared and anxious due to darkness during nighttime awakenings. You can place their favorite toy away from the baby’s bed but within their line of sight. You may also offer the baby a pacifier to calm them down to sleep.
  • Teach the baby to self-soothe.There are several ways to teach your baby to self-soothe, such as the cry it out method and the controlled crying method. During nighttime awakenings, avoid picking up the baby to soothe them.Instead, comfort them while they remain in the crib.

When To See A Doctor?

Sleep regression is a temporary event and seldom causes any adverse effects. Nevertheless, consult a pediatrician if the baby displays the following conditions.

  • Sleep regression for more than six weeks
  • Lack of growth
  • Lack of weight gain or sudden weight loss
  • Abnormal breathing or snoring during sleep
  • Significant changes in feeding and toilet habits
  • Significant behavioral changes
  • Loss of achieved developmental milestones

The 12-month sleep regression may come across as a tough time for parents. Thankfully, it is a temporary event. Sleep regression often occurs at a younger age, as well. Thus, many parents are likely to have experienced the event before and may know ways to manage it. Nevertheless, being patient and giving yourself and your baby extra care can help you wade through the 12-month sleep regression.


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