Baby Milestone Tracker

What this baby milestone tracker can tell you

A developmental milestone is a skill or behavior that most children can do by a particular age. It may involve connecting with people, communicating, learning, solving a problem, or moving the body. Choose an age above and check only the behaviors you have personally noticed. Your selections are saved in your browser so you can return later without creating an account.

The checklist follows the age points used by the Centers for Disease Control and Prevention (CDC): 2, 4, 6, 9, 12, 15, 18, 24 and 30 months, followed by 3, 4 and 5 years. The CDC describes these as abilities that most children—about 75% or more—can do by the listed age. That makes a milestone a useful conversation prompt, not a deadline that predicts a child’s health, intelligence, or future development.

This tool does not score development. A partially completed checklist is not a diagnosis, and a fully completed checklist does not replace routine care. Developmental screening uses validated questionnaires and clinical judgment; it is different from everyday milestone monitoring.

How to use the milestone checklist

1. Select the closest completed age. If your child is between two listed ages, begin with the younger checklist. You can look ahead for context, but do not treat the next age as a test.
2. Check what you have observed. A skill may appear at home, childcare, a playground, or a family visit. You do not need to repeatedly prompt your child to make a box count.
3. Return over time. Progress is stored separately for each age on this device. Revisit the checklist when you naturally notice a new skill.
4. Bring concerns to a professional. Write down examples, note when you first became concerned, and share the checklist at a well-child visit.

A child may show a skill in one setting but not another. Tiredness, hunger, unfamiliar people, illness, temperament, language exposure, and opportunities to practice can affect what you observe on a given day. Look for patterns rather than judging development from one moment.

The four areas of development

These areas develop together. Pointing, for example, uses movement but also communicates an idea and invites social attention. The categories simply make a long checklist easier to understand.

How to interpret your progress

The progress indicator reports how many boxes you checked; it does not convert the result into “on track,” “delayed,” or another medical label. Milestones are not a race, and reaching a skill earlier does not prove that a child is more advanced. The useful question is whether you are seeing steady development and whether anything about your child’s communication, behavior, learning, or movement concerns you.

If a milestone is not checked

First, consider whether you have had a good opportunity to observe it. You might ask another regular caregiver what they see, or watch during familiar play without drilling the skill. Keep a specific note such as “does not turn when called from nearby” rather than a broad label. Specific observations are easier to discuss with a pediatrician.

If your child was born prematurely

For a child born early, healthcare professionals may consider corrected age when discussing early milestones. Corrected age is based on how many weeks before 40 weeks of pregnancy the baby was born. Ask your child’s clinician which age to use and for how long, especially if you are unsure; the answer depends on the child’s medical history.

If skills develop unevenly

It is common to notice rapid progress in one area while another changes more slowly. What matters is the overall pattern and any professional concern. Do not use one strength to dismiss a concern in another area, and do not assume one unchecked item means a disorder.

Milestone monitoring is not developmental screening

Milestone monitoring is the ongoing process of noticing what a child does during ordinary life. Parents, caregivers, teachers and healthcare professionals can all contribute observations. Developmental screening is a more formal process that uses a validated tool at recommended visits or whenever a concern arises.

The American Academy of Pediatrics recommends general developmental screening at the 9-, 18- and 30-month well-child visits. Autism-specific screening is recommended at 18 and 24 months. Screening may also be appropriate at other times when a parent, caregiver or clinician has a concern. This tracker cannot perform either type of screening.

Keep routine well-child appointments even when the checklist looks reassuring. Those visits also cover growth, hearing, vision, feeding, sleep, safety, immunizations and family questions that a milestone list cannot address.

When to talk with your child’s healthcare professional

Contact your child’s pediatrician or another qualified healthcare professional if your child is not meeting one or more milestones for their age, if you notice a loss of a skill they previously used, or if you have any concern about how your child plays, learns, speaks, behaves, hears, sees, or moves. You do not need to wait for the next scheduled checklist age.

Before the conversation, collect a few concrete examples and observations from other regular caregivers. Ask directly about developmental screening and whether a referral or hearing, vision, speech, motor, or developmental evaluation is appropriate.

Families in the United States can also contact their state’s early intervention program without waiting for a physician referral. Early intervention serves eligible infants and toddlers younger than 3. For children age 3 or older, the local public school system can explain evaluation options. The CDC provides state contact information through its Act Early resources.

Support development through ordinary routines

Children build skills through safe, responsive interaction—not through pressure to perform a checklist. Use the age-specific activity shown in the tracker as a starting point, then follow your child’s attention and interests.

• Talk during routines. Name what you are doing while dressing, feeding, traveling, or cleaning up. Pause so your child has a chance to respond with a look, sound, gesture, or word.
• Read together. Babies benefit from hearing your voice and looking at pictures. With toddlers and preschoolers, ask simple questions and let them tell parts of the story.
• Make room for movement. Provide supervised floor play for babies and safe opportunities for older children to climb, throw, draw, build, and practice self-care.
• Use back-and-forth play. Copy a baby’s sound, roll a ball, take turns stacking blocks, or follow a child’s pretend-play idea.
• Repeat without testing. Children learn through repetition. Keep practice playful and stop when your child signals that they need a break.

Choose activities appropriate for your child’s abilities and supervise closely. Keep small objects and other choking hazards away from young children, and follow current safety guidance for sleep, feeding, toys, water, stairs and outdoor play.

Privacy and saved progress

This version does not ask for a child’s name, birth date, medical information, or account. Checklist selections are stored through local browser storage on the device you are using. They may disappear if you clear site data, use private browsing, switch browsers, or move to another device. Genesis Parent Portal does not receive the checked-box data through this tool.

Use “Print summary” if you want a paper or PDF copy for your records or a healthcare visit. Review the document before sharing it because milestone information can still be personal health-related information.

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Last reviewed: September 2026.