9 Week Old Baby: Development, Milestones & Care Tips

Your 9 Week Old Baby – Development, Milestones & Care

Medically Reviewed By
Dr. Arti Sharma (Paediatrician)
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It has been 2 months of your baby’s life already, and he would have grown up to learn a lot and recognize a lot of things as well. Your baby would probably be quite a rollicking ball of laughter and fun for everyone at home and everyone would be ecstatic about it. Having discovered their hands, he will try to do all sorts of things with it and fail in the most hilarious ways. Here’s more of what you can expect from your little one.

9 Week Old Baby Development

In a 9 week old baby, growth spurt will be quite substantial when compared to anything before that. His hearing will already be completely developed. You might notice that your baby starts noticing the subtle differences between different sounds and react to them accordingly. If you start playing his favourite song, he will kick his legs animatedly and listen carefully. Switch it off between and he will be upset. Try playing a slower song or a faster song and you will see him either like it or even drift off to sleep.

Around this time, your baby is also discovering his hands and experimenting with the grip. Now is the most opportune time to give him a rattle. By figuring out the sound and trying his best to emulate it, he will start developing the coordination between hands to eyes in a much better manner. This learning of coordination starts developing faster than usual, primarily because their eyes are now able to perceive 3-dimensional space and depth. It is still in the initial stages but quite better than before.

[Also Read: 2 Months Old Baby Development]

Nine Week Old Baby Milestones

For a 9-week old baby, weight gain will be nearly around a kilo to a kilo and a half more than it was since his birth. This is a healthy milestone to look for and is accompanied by many others.

Having discovered the presence of hands and legs and understanding how they work, there will be further degrees of motion as your baby starts understanding bending the arm at the elbow and the legs at the knees. This will then make their punches and kicks more powerful than before, and be able to aim them properly. All these action-filled movements will be filled with more grunts and cooing sounds, as your baby tries to show you anything new that he has learnt. Keep conversing with him in a variety of tones and modulations.

To try and perceive things better, your baby will even reach out to touch your face or grab on to your hair. If you are a fan of danglers, it is best to keep them in the cupboard since the naughty little one will go for them the first chance he gets. He will also interact with other people, and with other babies, too. Though there might not be any conversation, having a social life at this stage itself is quite helpful.

[Also Read: 2 Months Old Baby Milestones]


The tendency to feed on both breasts will be even stronger than before now. Your body might need to get used to it but that will happen in quite a short time. Many mothers feel that since their baby is more than 2 months old, they might need more food than required. That isn’t true. As long as your baby is happily breastfeeding, is gaining weight properly and sleeping well, there is no need for additional food items or formula milk at this age. Since your baby is 9-week old, teething might be occurring as well, which could also end up in him suckling at your breast a little harder than usual.

[Also Read: 2 Months Old Baby Food]



If your baby is not used to having a dummy nipple in his mouth while sleeping, that is the best decision of all time. Generally, when babies are 2 months old, they get used to those dummy nipples and then fail to sleep properly if the nipple falls off in the midst of their nap. If your baby is already used to it, start weaning them gradually from that so as to let them sleep without it. It might take a few days but is beneficial in the long run.

Since your baby has grown both in length and size, you might need to find a larger cloth to wrap him while he sleeps. Continuing to use smaller cloth could constrict his movements in an uncomfortable fashion and lead to broken sleep.

[Also Read: 2 Months Old Baby Sleep]


Your baby’s cooing and grunting start maturing into gargle-resembling laughter at times when they are a little too excited. In certain times of the day, he will be more responsive and will end up giving the most adorable smiles and make sounds along with you. This can make for interesting bathing times or early morning exercises for both of you.

With supervised tummy time being continued, by this age, they will be able to lift their head properly and look straight ahead. Using their arms to support them will be more possible now, but not for long. They will keep falling over repeatedly and still try to keep doing it. All of that’s natural, as long as they don’t hurt themselves on a hard surface.


Around 2 months is one of the peak periods when babies end up crying a lot. Even the slightest disturbance in your 9-week old baby sleep patterns can cause them to lose their cool and indulge in an extended crying routine. Other reasons for their unexplained crying could range from exhaustion, pain, or even mere irritation.

Sure, certain reasons for crying might be pain or illness but most of the times, you can tell if they are actually in pain or simply crying without reason. In such a scenario, you can keep your baby in the crib and continue with your activities. Close the door lightly if needed to prevent the crying from disturbing you. If the crying still continues after 5 minutes, take them in your arms and cuddle them a bit. Try using a sling to hold the baby and carry on with your activities.


9 Week Old Baby Care Tips

  • Make sure your baby alternates between breasts if he wants to or if he needs more milk than usual.
  • If your baby cries a lot, try to hold him close or coo in his ears. By soothing him down, he can fall asleep quickly.
  • A baby might cry or make sounds if he wants to play or simply see your face. Make a note of certain sounds and see if they match with the need.
  • Take your baby outside the house for some fresh air and have nice conversations with him. He will love the new sights or even fall asleep in the calmness of it.

[Also Read: 2 Months Old Baby Care]

Tests and Vaccinations

There are no specific vaccines to be administered in the 9th week of your child’s age as long as all the previous vaccines have been completed fully.

Games and Activities

This is a great time to further develop the auditory senses of your child. You can collect a variety of items from the house that make all sorts of sounds. Squeaky toys, crumply bags, bubble wrap, steel items, and so on. Avoid any electronic sounds for now. Then start making one sound at a time while looking at your baby. Don’t show him the object right away. Once he starts understanding the sound, show the object and make the sound in front of him. Then, hand over it to him and let him try to make it himself. Seeing you make the funny sounds will make him happy. But seeing himself capable of making the same sounds like you, will give him immense joy and excitement.

With a comparatively stronger upper body and neck, you can start having practices of sitting upright and playing games. Initially, use a few pillows to make your baby lie in a slightly inclined position. Then gently pull his arms very slowly and let him sit upright. Make sure he has enough time to hold his neck straight, in line with his shoulders. Once straight, let him down on the pillows again. Make funny sounds that rise up and down with the movement. Not only will it be immense fun for the baby, but it will help develop the necessary strength as well. Playing with his arms while you do so can be an added fun element.

[Also Read: 2 Months Old Baby Games and Activities]


Consult a Doctor if

At this stage, there are times when your baby’s eyes could be a little more watery than usual. If this has been present since birth, it is fine. However, if you notice it out of the blue, there might be a chance that your baby has contracted conjunctivitis. Hence, it is important to bring this to your doctor’s notice, who will usually prescribe using a baby-friendly eye drop solution if the diagnosis is correct. Keep all clothing items hygienic and your hands clean if this were to be the case.

If there is diaper rash, treating it using breastmilk is the best bet. If it seems to get more severe over time, then it could be a skin-related condition that needs to be examined by the doctor.

Babies are a delight at this stage and also a little irritating. Their crying increases but their level of activities and interactions increase as well. Make the best of these times and remember these memories, for all of them will be quickly a matter of history as your baby is growing up rapidly.

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