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3-9 Months
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Routine checkups protect your baby's health. See what’s ahead.

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From 3 to 9 months, your baby is growing fast. At each routine checkup, your doctor will track development, answer questions about feeding and sleep, and continue your baby’s recommended vaccine schedule.
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Make the most of every checkup

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Getting more than one vaccine at the same visit is often recommended to help your baby. But remember, it's normal for babies to receive more than one recommended vaccine in the same visit to help protect them against certain potentially serious diseases. While it may seen like a lot, receiving multiple vaccinations does not overload their immune system.

Make sure your baby stays up to date with every dose of each vaccine for lasting protection. Explore the guides to each checkup below, or download the CDC-recommended vaccine schedule.

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View CDC vaccine schedule
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The CDC website is neither owned nor controlled by Pfizer. Pfizer does not endorse and is not responsible for the content or services of this site.
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What to expect at routine checkups during this stage

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4-month checkup

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Your baby is learning fast—and likely smiling, cooing, and rolling. This visit checks progress and provides important next doses of vaccines.
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*If the mother didn’t receive an RSV vaccine during pregnancy, or received it within 14 days of the baby’s birth, it is recommended to give the baby (8 months or younger) 1 dose of RSV antibody during their first RSV season.

This is not a complete list. Please speak with your baby’s doctor if you have questions on what screenings or vaccinations to expect. Additionally, every baby develops at their own pace. The milestones listed are general guidelines. If you have any questions or concerns about your baby’s development, please consult your pediatrician.

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Vaccinations

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  • Respiratory syncytial virus (RSV) immunization, if eligible and in season*

Second dose of:

  • Diphtheria, tetanus, and acellular pertussis vaccine (DTaP)
  • Haemophilus influenzae type b vaccine (Hib)
  • Inactivated poliovirus vaccine (IPV)
  • Pneumococcal conjugate vaccine (PCV)
  • Rotavirus vaccine (RV)
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Developmental milestones

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  • Rolls from tummy to back
  • Laughs
  • Reaches and grasps toys
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Additional screenings

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  • Growth tracking and reflex screening
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Discussion topics and tips

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  • Ask about teething and sleep routines
  • Go over when to start solid foods
  • Discuss how to encourage active play and development
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6-month checkup

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Your baby may be sitting, smiling, and ready to try solids. This checkup helps you stay on schedule.
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*If the mother didn’t receive an RSV vaccine during pregnancy, or received it within 14 days of the baby’s birth, it is recommended to give the baby (8 months or younger) 1 dose of RSV antibody during their first RSV season.

This is not a complete list. Please speak with your baby’s doctor if you have questions on what screenings or vaccinations to expect. Additionally, every baby develops at their own pace. The milestones listed are general guidelines. If you have any questions or concerns about your baby’s development, please consult your pediatrician.

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Vaccinations

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Routine vaccines at this age:

  • Respiratory syncytial virus (RSV) immunization, if eligible and in season*
  • Third dose of:
    • Pneumococcal conjugate vaccine (PCV)
    • Diphtheria, tetanus, and acellular pertussis vaccine (DTaP)
    • Haemophilus influenzae type b vaccine, depending on vaccine used (Hib)
    • Inactivated poliovirus vaccine (IPV)
    • Hepatitis B vaccine (HepB), if following the 3-dose schedule
    • Rotavirus vaccine (RV), if not completed earlier
  • Additional vaccines:
    • Influenza (flu), if in season
    • COVID-19, if eligible and recommended
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Developmental milestones

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  • Likes to look at self in a mirror
  • Babbles
  • Reaches to grab a toy she wants
  • Rolls from back to tummy
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Additional screenings

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  • Teething check
  • Early developmental screening
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Discussion topics and tips

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  • Go over signs that your baby is ready for solids
  • Discuss teething and cleaning your baby’s teeth
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9-month checkup

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Your baby may be crawling, cruising, or saying early words. While vaccines may not be given unless catching up, this visit checks in on overall development.
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This is not a complete list. Please speak with your baby’s doctor if you have questions on what screenings or vaccinations to expect. Additionally, every baby develops at their own pace. The milestones listed are general guidelines. If you have any questions or concerns about your baby’s development, please consult your pediatrician.
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Vaccinations

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Routine vaccines at this age:

  • None, but ask your baby’s doctor if they need any catch-up doses from previous checkups

Additional vaccines:

  • Influenza (flu), if in season
  • COVID-19, if eligible and recommended
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Developmental milestones

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  • Pulls to stand
  • Turns when name called
  • Points and uses gestures
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Additional screenings

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  • Developmental and behavioral/social/emotional check
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Discussion topics and tips

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  • Encourage speech and interaction
  • Review sleep routines and safety
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Routine checkups help you stay on track

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Your baby’s checkups are key to staying ahead of their health and development. Keep learning what to expect at every checkup so you can show up informed and prepared.