Why is My 3 Month Old Sleeping So Much? | Investigating Causes and Solutions


As a new parent, you may be concerned about your 3-month-old baby’s sleeping habits. While some babies will sleep more than others, it is important to understand why your baby may be sleeping excessively and what you can do to help them get enough rest. This article will explore the common causes of excessive sleep in three-month-olds, the benefits and risks associated with it, and how to manage their sleep schedule.

Investigating Why Your 3-Month-Old is Sleeping Excessively

It is normal for newborns to sleep 16 hours or more per day, but by the time they reach three months, most babies will have settled into a more regular sleep schedule. If your three-month-old is still sleeping for long stretches during the day and night, it may be cause for concern.

There are several common causes of excessive sleep in three month olds, including:

  • Growth spurts: Babies experience growth spurts throughout their first year of life, which can lead to increased sleeping.
  • Sleep regression: Sleep regressions typically occur at 4 months, 8 months, 12 months, and 18 months, and can cause babies to sleep more than usual.
  • Overtiredness: When babies become overtired, they may sleep more to make up for lost sleep.
  • Illness: If your baby is sick, they may need to sleep more to heal.
  • Developmental changes: As babies grow and develop, their sleep patterns can change.

In addition to the above factors, signs and symptoms associated with excessive sleep in three month olds include:

  • Long naps or extended periods of sleep throughout the day
  • Difficulty waking up from naps or night sleep
  • Irritability when awake
  • Decreased appetite
  • Difficulty settling down for sleep

The Benefits and Risks of Excessive Sleep in Three Month Olds

Excessive sleep in three month olds can be beneficial in some cases. For example, if your baby is experiencing a growth spurt, extra sleep can help them grow and develop properly. Additionally, if your baby is overtired, extra sleep can help them catch up on rest.

However, there are also risks associated with excessive sleep in three month olds. For example, your baby may not be getting enough stimulation during the day, which can lead to developmental delays. Additionally, if your baby is sleeping too much, they may not be getting enough calories and nutrients, which can lead to weight loss or failure to thrive.

How to Manage Your Baby’s Sleep Schedule

When it comes to managing your baby’s sleep schedule, it is important to create a consistent bedtime routine and ensure that your baby is getting enough stimulation during the day. Here are some tips for helping your baby sleep better:

  • Set a consistent bedtime routine: Establishing a bedtime routine can help your baby relax and prepare for sleep. Try to stick to the same routine each night to set your baby up for success.
  • Create a safe sleeping environment: Make sure your baby’s crib or bassinet is free of blankets, pillows, and toys to reduce the risk of SIDS. Additionally, keep the room temperature comfortable and make sure the noise level is low.
  • Encourage healthy sleep habits: Help your baby learn to self-soothe by giving them a pacifier or rubbing their back until they drift off to sleep. You can also try swaddling your baby or playing calming music to help them relax.

Understanding the Different Sleep Patterns of 3-Month-Olds

It is important to remember that all babies have different sleep needs and schedules. On average, three-month-olds need between 14 and 17 hours of sleep per day, but this can vary depending on the individual. Additionally, three-month-olds typically have two distinct sleep cycles – one during the day and one at night.

During the day, your baby may take several short naps and wake up after an hour or two. At night, they should be able to sleep for longer stretches of up to 6 or 7 hours. However, if your baby is sleeping more than usual, it may be a sign that something is wrong.

What to Do When Your 3-Month-Old is Sleeping Too Much

If your three-month-old is sleeping excessively, it is important to talk to your doctor to rule out any underlying medical issues. Your doctor may also be able to provide advice on how to help your baby sleep better. Additionally, be sure to look for signs of illness, such as fever, vomiting, or diarrhea, and make sure your baby is getting enough stimulation during the day.


It is normal for three-month-olds to sleep more than other babies, but excessive sleep can indicate a problem. Common causes of excessive sleep in three-month-olds include growth spurts, sleep regressions, overtiredness, illness, and developmental changes. There are both benefits and risks associated with excessive sleep in this age group, so it is important to talk to your doctor if you are concerned. To help your baby sleep better, establish a consistent bedtime routine, create a safe sleeping environment, and encourage healthy sleep habits. By understanding why your baby is sleeping excessively and taking the appropriate steps to address the issue, you can help ensure that your baby gets the rest they need.

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