Baby Week 09: Your baby is now 9 weeks old, and can distinguish familiar sounds from other sounds. Your little one’s listening skills is also getting better. Your baby is increasingly adapting to the environment, so you can watch how your baby reacts to a particular sound and see how your baby can tell the source of the sound.

Continuous conversations help your baby develop a sense of place, and your baby may keep watching your mouth and being fascinated by it as you speak.You may be surprised that babies are making more and more diverse sounds (like music or vowels) and begin to express different needs with unique laughter and crying.

During week 09, your baby may:

  • Smile back at you if the baby sees you smiling
  • Able to distinguish familiar sounds from other sounds.
  • Find the source of the sound.
  • More adaptable to the environment.
  • When they hear a ringtone, they react differently, such as staring, crying, or silent.

How to take care of your baby? – Baby Week 09

You can help your child by continuing conversations with your child, which may feel like talking to yourself, but it will help your child’s cognitive development as they learn from the movements, expressions and emotions of your mouth. You may be surprised that your baby’s communication skills are starting to evolve to the point that they can grunt, laugh or cry to express different needs.

Health information for your baby – Baby Week 09

Depending on the baby’s condition, the assessment methods performed by the physician will vary.You may have some expectations or doubts about your baby’s growth. Consult your doctor for the following conditions:

  • Your doctor will check your baby’s weight, height and head circumference to ensure your baby’s growth is normal.
  • Examining vision, hearing, heart and lung function, thoroughly from head to toe, chest to back to ensure that your baby is healthy and healthy.

Vaccination for 9 Week Old Babies

  • Hepatitis B,
  • Poliomyelitis (polio),
    Diphtheria,
  • Tetanus,
  • Pertussis,
  • Hepatitis,
  • Streptococcal pneumococcal, avoid earInfection causes meningitis and Rotavirus to cause severe diarrhea.

The needs and development of your 9 week old baby

You should know the following:

Vaccination

Many parents should have heard a lot about the risks of vaccines, but your doctor will tell you that vaccination is beneficial for most babies, as it avoids infection from some susceptible diseases.

Immunization is based on mechanisms that naturally produce antibodies when we are exposed to weakened or dead pathogenic microorganisms, or when exposed to hazardous substances that become harmless by heat or chemical treatment. If your baby is infected with these viruses, antibodies work, and they are kept in the immune system, and they are killed as soon as a specific microbial invasion is found in the body.


Even if vaccines save the lives of thousands of children every year, this preventive measure is not perfect. Most children react only slightly to the vaccine, but some become sick and even very severe. In rare cases, vaccines cause permanent injury or death to newborns. To reduce your risk, you can use the following precautions to ensure your baby is vaccinated in a safe way:

  • Make sure your doctor thoroughly examines your baby’s health before vaccination to confirm that your baby is not suffering from any serious illness.
  • If the baby is sick, it is necessary to delay the vaccination.
  • If it is only a mild symptom such as a cold, it is not necessary to postpone the vaccination.

Please read the information your doctor has given you before vaccination.

During 72 hours of vaccination (especially the first 48 hours), observe any serious reactions or abnormal movements of your baby and notify your doctor immediately. In addition, the next time you see a doctor, let them know how your baby responded to the vaccinations.

Ask your doctor for the vaccine manufacturer, batch number, and other information. If your baby has a serious response, your doctor will report it to their superior and provide timely care and treatment.

Although severe reactions are rare after vaccination, please contact your doctor immediately if your baby is suffering from any of the following symptoms within two days of vaccination:

  • High fever of more than 40 degrees.
  • Crying continuously for more than 3 hours.
  • Epilepsy/seizure: This symptom is normal, but does not cause severe fever.
  • Epilepsy or abnormal behavior within 7 days.
  • Allergies such as swelling of the mouth, face or throat, breathing problems a, hives.
  • Indulgence, retardation and severe drowsiness.
  • If your baby has any of these symptoms after vaccination, take your baby to a doctor and record them to reduce the risk of subsequent vaccination.

Reminder for novice parents

Here are some things you might want to know:

Bottle Feeding

Some moms choose bottle feeding because they might be busy in the afternoon and evening. Some people have to go back to work, or lack of milk, causing their children to gain weight slowly.

If you plan to feed your baby regular bottle, you can freeze 6 bottles of milk at a time in the refrigerator. In case of emergency such as when you need to be on medication or have a sudden illness, your baby still has enough milk to drink.


Some babies change from pro to bottle feeding, with no transition period at all, while others make their mother’s brain break. However, if you extend your baby to 3 weeks, starting from week 1, most babies will find it easier to adapt. Early bottle feeding can hinder pro-feeding because baby can confuse breast with nipples. Another reason is that the technique of pro-bottle and bottle feeding is different. If your baby is too familiar with your mother’s nipples for more than a period of time, they may refuse the bottle because they are too familiar with their mother’s nipples.

Feeding is very comfortable because you don’t have to worry about how much milk your baby needs to drink. The first level is how much milk your baby needs to drink when you start with a bottle.During this period, consult a physician or dietitian as babies of different ages need different nutrition.


If you have to return to work, you will miss at least two meals for in-person feeding, change to bottle feeding and start bottle feeding two weeks before returning to work.Give your baby at least a week to adjust to bottle feeding, starting with one bottle before feeding two bottles a day.If you’re going to let your baby drink formula, this will not only help your baby, but also help your body adapt gradually, reducing the amount of milk and making it easier to get back to work.


Baby smiles for the first time

If your baby doesn’t smile at you, don’t worry too much, even the happiest child won’t laugh until the 6th or 7th week. When your baby starts to smile, it’s just a random expression, and then you can see whether your baby is laughing across the face or just using the muscles of the mouth to tell when your baby is laughing. Although it’s not possible to laugh before your baby’s body is ready, you can quickly see your baby laughing as long as you talk, play and hug.

Read: Baby Week 08: When to Give a Pacifier