Baby Development: Your Baby’s 5th Month of Life

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Update Date 07/07/2020 . 4 mins read
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Your 5-month-old baby is going to be showing a lot of personality this month. However, there is much more to your baby’s development than smiles and growth. Here are some fast facts and other 5-month-old baby development milestones you should look out for. 

How Your Baby is Growing

On average, babies double their birth weight at 4 to 5 months old, because they usually gain 1-1 ¼-lbs every month. They may also grow ½-inch in head size each month.

However, babies can grow at different rates because of genetics, premature birth, and other factors. The average height for a 5-month baby, however, is 25.20-25.98-inches tall.

Developmental Milestones 

Some babies may have hit the following milestones last month, but some babies may hit certain milestones in their fifth month. Here are some things that you may see in their fifth month of life.

Motor Skills 

By now, your baby has gained tons of new motor skills. They may start rolling over and reaching out for a rattle and hold it. 

They may be able to sit up with support as well. You may even notice your baby pushing up to get into a sitting position. For many, they can now hold up their chest and head by themselves. These are all some of the many exciting 5-month-old baby development milestones. 

Cognitive Skills

You may feel that your baby is now watching your every move. They are more focused on watching objects and people as they move around.

Your baby is able to see more color at 5 months and has started developing a sense of depth perception.

As for hearing, your baby may start paying more attention to music. They also notice when a toy makes a sound.

Your baby may be full of laughs and giggles at this point. They can recognize faces, including their own reflection.

Communication and Language Skills

Your baby may love to babble when they are 5 months old. There is a good chance that their babbles may even start to sound like real words! While they may not say “dada” or “mama” quite yet, this is a sign that they are getting there.

Your baby may also try to make sense of any sound that they hear. For instance, they may know that your dog is the one barking. They may also understand the word “no” and respond to their name.

Social and Emotional Development

You may notice that your baby loves to express emotions at 5 months old. They may start smiling and laughing. However, this may also mean that they will express themselves when they are upset by crying, frowning, grunting, etc. 

Feeding & Nutrition

Your baby may need to eat more when they are 5 months old. They need to eat 28 to 32-oz. per day of milk. However, it may be best to consult a doctor on how much your baby should eat. 

At this stage, babies can start trying out some single-ingredient solid foods, such as pureed fruits or veggies. However, remember that solid food should not replace their formula or breastmilk. Solid food is only meant to complement formula and breastfeeding.

Baby Care Tips

When you bathe your baby, it would be ideal to use the right product. It is best to stay away from products that have harsh ingredients because they have sensitive skin.


Your baby may sleep for about 14-15 hours each day. Luckily for you, as much as 10 hours of that may be at night time, which allows you to sleep, too. 

In addition, they may need several naps throughout the day. Your baby may have several short naps or prefer 2 longer naps. Keep in mind it would always be ideal to have your baby sleep on their back. 

Baby Health & Safety 

As mentioned earlier, it is best for your baby to sleep on their back. Avoid letting them sleep on their side or stomach.

To make sure your baby is safe, start babyproofing your house. It would also be good to keep anything dangerous out of their reach.


Your baby will not need to get immunization this month. However, they should get the following if they have not yet received the shots. These include vaccinations for HepB, RV, HepA, DTaP, etc.

While babies grow at different rates, you may have to bring your baby to a doctor if you suspect a developmental delay. These include:

  • Your baby not recognizing you or your partner by voice or sight
  • They cannot hold up their own head
  • Not being able to smile yet
  • Unable to hold and grasp items
  • Not making babbling or cooing noises.

Your baby may also start to contract common child illnesses. Some of these can include coughs, colds, etc. If the symptoms do not ease after a few days and your baby has a hard time eating, seek medical attention. 

For coughs, see a doctor if your baby has experienced symptoms for more than a week and if they have nasal mucus for longer than 10-14 days. 

What Can I Do to Help My Baby Grow?

Doing simple things such as making sure your baby is sleeping and eating sufficiently will greatly help their growth and development. It may not be a good idea to try overfeeding your baby to make them gain more weight. 

You can slowly start introducing more solid foods into their diet to give them more nutrients. You can also try to encourage longer playtime to encourage them to be active.

What to Watch Out For and When to See a Doctor

If your baby has a temperature of 102 degrees or higher and looks sickly, bring them to a doctor straight away. If your baby has watery, loose, or bloody stools, you may need medical attention for your baby.

Baby Poop Color and Consistency: All You Need to Know

Schedule an appointment with your baby’s primary physician for any of the following conditions:

  • Your baby experiences sudden changes in behavior or appetite
  • Eye discharge
  • Constipation
  • Dehydration

Your baby is making big strides in their development by their 5th month of life. Be sure to read up on all the facts to learn what your baby needs and what you could expect, most especially when it comes to 5-month-old baby development milestones.

Learn more about Parenting here

Hello Health Group does not provide medical advice, diagnosis or treatment.

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