A complete guide to baby’s developmental milestones from 3-6 Months

Watching your baby growing and changing is always exciting and if you have been watching this space, you were already awaiting this article! So, here’s the complete guide on your baby’s upcoming developmental milestones between 3-6 months, start noting them today!

3 - 4 Month:

Physical Milestones:


This month you can expect a weight gain of 250 grams to 500 grams, which is comparatively less than the first three months.

1. Motor Skills: 

  • Improved neck strength and head movements
  • Raises chest and head up while lying on tummy with arms support
  • Grabbing and tries to mouth a toy or object 
  • Stares and shakes nearby objects
  • Rolls from tummy to back
  • Sits with pillows’ support
  • Using one hand at a time to reach toys

2. Sleep:

  • In the age of 3-6 months, babies tend to sleep for 14-16 hours a day, which includes a 7-8 hours night sleep and 2-3 naps during daytime.

Cognitive development Milestones: 

1. Eyesight: 

  • Improved vision by 20-40% 
  • Able to focus on primary colours
  • Able to see across the room
  • Crosses eyes while focusing on objects
  • Follows moving people and objects by turning head side-to-side

2. Touch

  • Responds to affection and soft touch with smile or babble

Eating/Feeding Milestones:

1. Breastfed babies - 8-10 times a day or on demand (after every three to four hours)
2. Bottle Fed babies - 6-8 times a day (150-200ml per kg of body weight in a day) 
(This will remain same during the 3-5 months)

Communication and language milestones:

1. Starts babbling with vowel sounds
2. Cries to get a response

Social and Emotional Milestones:

1. Uses face to express different emotions
2. Understands your emotions from your voice and face expressions
3. Deliberately drops objects to communicate and play
4. Smiles more often, especially at human faces
5. Mimics movements and expressions

4 - 5 Months:

Physical Milestones:

1. Growth:

  • In this month, your baby will probably go through a growth spurt which means an increased diet

2. Motor Skills: 

  • Able to sit without support for a few seconds
  • Starts rolling from back to tummy
  • Passes objects from one hand to another hand
  • Uses palm and index finger to hold objects

Cognitive or Mental Milestones:

1. Eye Sight:

  • Focuses on objects without crossing eyes
  • Able to differentiate two different shades of the same colour

2. Hearing:

  • Starts responding to own name and loud noises

Communication and language milestones:

1. Makes continuous sounds to get a response
2. Babbles as in making real words’ sound

Social and Emotional Milestones:

1. Laughs on showing funny faces or making different sounds
2. Smiles while looking in the mirror
3. Looks at new people in a public place 

5 - 6 Months:

Physical Milestones:

1. Growth:

  • Most babies are likely to double their birth weight by the end of this month, however, you may find a dip in their weight and height increasing trend. 

2. Motor Skills: 

  • Able to sit without support
  • Rolls in both directions
  • Slides backward and forward with the help of tummy
  • Tries to rock like a four hand animal, first, attempt towards crawling stage

Cognitive or Mental Milestones:

1. Eye Sight:

  • Focuses on all nearby objects
  • Tries to grab things even when not in reach

2. Taste

  • Tries to taste every object to feel the texture

Eating/Feeding Milestones:

1. With breastfeed or bottle, may take 1-2 teaspoon of cereals

Communication and language milestones:

1. Responds to sounds by making sounds in return
2. Understands the word “no” and stops when hears “no”
3. Babbles and make sounds in turn with parents
4. Actively responds when his/her name is called out

Social and Emotional Milestones:

1. Shows early signs of stranger anxiety
2. Loves to play with parents or with familiar faces

Red Flags: When to contact your paediatrician

By 4 monthBy 5 monthBy 6 month
• Doesn't try to mimic sounds or babble
• Doesn't mouth objects at all
• Doesn't push down with legs when feet are on a stable surface
• Poor head control
• Always keeps hands in a fist
• Crossing eyes most of the time
• Doesn't roll over in either direction
• Doesn't try to grab objects which are in reach 
• Doesn't make vowel sounds 
• Doesn't make eye contact at all
• Doesn't respond to loud sounds
• Can't sit with help
• Doesn't laugh or make yelling sounds
• Seems very stiff or floppy
• Doesn't follow moving objects 
• Doesn't make any sound

Also read more about: Development of the baby: 0-4 weeks, Development Of The Baby: 4 Weeks To 8 weeks, Development of your little one – Birth to 36 Months, A complete guide to baby’s developmental milestones from 0-3 Months 

Note from BabyChakra: The views and opinions expressed in posts are solely those of the authors and do not necessarily reflect the views held by BabyChakra, its creators or employees. If you find yourself violently disagreeing with something and want to educate the world as a mother, please contact us about writing an article of your own voicing the contrary side of the issue. BabyChakra is not responsible for the accuracy of any of the information provided herein by the bloggers. However, we respect the choices that the mother or parent has made, and trust that he/she has done her own due diligence.

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Comments (32)

very true tips

Priyanka Verma

Vry nice guidance

Snehal Naidu

my baby has completed his 3 months on 24th.... n he always has his hands in his mouth... like he is chewing it


I wish I knew this before

shweta jain

same wid me. on 12 June my baby has completed 3 months. He started from last 8 days sucking his thumb. is it ok

shweta jain

he is a colic baby.

Pooja Singh

This is just in time

Dolly Shah Gandhi

This is just in time

Sonal Swapnil

This is exactly what I was looking for.

Shari Menon

Good article..very helpful


very helpful

Swati Fariya

Nice article ..... Very helpful for first time moms........

Annie Mathew

Wow..so informative..


Nice article...!!

Jyoty Gopal

Tells me how..

Yashu Chaithra

This is exactly what I was looking for. - Bang on!

Priya Nevtia

I wish I knew this before

lubna tabassum

This is just in time


Very helpful


This is so well written.

Shazia Khan

1 month old baby

Payal Roy

Hi Payal roy

Payal Roy

Mera baby 1 1/2 ka ho gya h lekin wo apne ap potty nhi krta h kya kru

Payal Roy

Uska wait v nhi badh rha h... Birth k tym 3.2 tha lekin ab 2.7 h kya kru

Neha Mandal

I wish I knew this before

Sukhoi 007

I wish I knew this before


This is so well written.


I wish I knew this before

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