# What is the CDC Learn the Signs. Act Early. (CDC-LTSAE) Milestones?

Canonical: https://pinnacleblooms.org/ask/what-is-the-cdc-learn-the-signs-act-early-milestones-cdc-ltsae-and-what-does-it-assess
Publisher: Pinnacle Blooms Network / Bharath Healthcare Laboratories Private Limited

The CDC Learn the Signs. Act Early. (CDC-LTSAE) Milestones are free, age-based checklists from the US Centers for Disease Control and Prevention that describe what most children can do at key ages across four areas — social-emotional, language and communication, cognitive (learning and problem-solving), and movement. They are a tool to track development and prompt timely action, not a diagnostic test, and they give no score or label. If a checklist raises a concern, the message is to act early and ask a clinician for a developmental check.

*A free, friendly set of checklists from the CDC that helps families notice how a child plays, learns, speaks, acts and moves as they grow.*

## In short
The **CDC Learn the Signs. Act Early. (CDC-LTSAE) Milestones** are a free public-health resource from the United States Centers for Disease Control and Prevention. They are simple, age-based checklists of the things most children can do by certain ages — in playing, learning, speaking, acting and moving. They are a way to *track* a child's development and to start a timely conversation if something seems different. They are not a diagnostic test and they do not give a score or a label.

## What the CDC-LTSAE Milestones assess
The milestones are organised by age, with checklists at key points across the early years (for example around 2 months, 6 months, 1 year, 18 months, 2 years and beyond). At each age they describe what most children can do across four everyday areas:

- **Social and emotional** — how a child connects with people, shows feelings and responds to others.
- **Language and communication** — sounds, gestures, first words, understanding and putting words together.
- **Cognitive (learning, thinking, problem-solving)** — exploring, remembering, and figuring things out through play.
- **Movement and physical development** — both large movements (rolling, sitting, walking) and small hand skills.

Each milestone is phrased as something *most* children do by that age, so a checklist makes it easy for a parent to see the bigger picture rather than worry over a single skill. The free CDC **Milestone Tracker** app lets families keep a photo-and-tick record over time. Importantly, this is an *awareness and tracking* tool — it helps you decide whether to ask for a fuller look, not to make any conclusion yourself.

## When to act early
The heart of the message is in the name: *act early*. If a checklist makes you pause — your child has lost a skill they once had, or is some way behind several milestones for their age, or simply something feels different — that is a reason to talk to your paediatrician and ask about a developmental check, not a reason to panic. Acting early opens the door to support during the years when a young brain learns most readily.

## The Pinnacle way
The CDC-LTSAE Milestones are a wonderful first step at home — but checklists do not diagnose. A clinical [AbilityScore®](/ask/what-is-the-abilityscore-and-how-is-it-calculated) and any diagnosis are formed only at a Pinnacle Blooms Network centre, under qualified clinician care, never from an app or a form. Our team uses tools like the [CDC-LTSAE milestones](/cdc-ltsae) as a starting conversation, then looks at the whole child and, where helpful, draws on supports such as [speech therapy](https://www.pinnacleblooms.org/top-speech-therapy-center-india-proven-improvement-rate) to build an individualised plan.

## Trusted sources
CDC Learn the Signs. Act Early. milestone guidance and the free Milestone Tracker app; the American Academy of Pediatrics and HealthyChildren on developmental milestones and developmental monitoring; WHO Nurturing Care Framework on early childhood development.

**Next step —** If a milestone checklist has left you wondering, book a developmental review at your nearest Pinnacle Blooms Network centre to understand your child's strengths and start any helpful support early.

This is general information, not a diagnosis — individual assessment and diagnosis require an appropriately qualified healthcare professional.

## Sources
- CDC Learn the Signs. Act Early. Milestones: https://www.cdc.gov/child-development
- AAP HealthyChildren on developmental milestones: https://www.healthychildren.org
- WHO Nurturing Care Framework: https://nurturing-care.org

## Connected topics and perspectives
- Assessments: https://pinnacleblooms.org/ask/assessments
- Parent: https://pinnacleblooms.org/ask/lens/stakeholder/parent
- Definition: https://pinnacleblooms.org/ask/lens/intent/definition
- Measure: https://pinnacleblooms.org/ask/lens/lifecycle/measure
- Screen: https://pinnacleblooms.org/ask/lens/route/screen
- Early Clarity: https://pinnacleblooms.org/ask/lens/empowerment/early_clarity

## Related question paths

### Understand the subject
- At what age is the CDC LTSAE milestone tool used for a child?: https://pinnacleblooms.org/ask/at-what-age-is-the-cdc-ltsae-developmental-assessment-used-for-a-child

### Understand assessment
- Should my child have a CDC-LTSAE assessment, and what does it involve?: https://pinnacleblooms.org/ask/should-my-child-have-a-cdc-ltsae-assessment-and-what-does-it-involve
- When is the CDC-LTSAE indicated, and what are its strengths and limits?: https://pinnacleblooms.org/ask/when-is-the-cdc-ltsae-indicated-and-what-are-its-strengths-and-limits-in-early-childhood
- How does the CDC-LTSAE compare with the AbilityScore developmental assessment?: https://pinnacleblooms.org/ask/how-does-the-cdc-ltsae-compare-with-the-abilityscore-developmental-assessment

### Explore therapy & support
- What Are Developmental Milestones?: https://pinnacleblooms.org/ask/what-are-developmental-milestones
- What should I do if my child isn't reaching milestones like other kids?: https://pinnacleblooms.org/ask/what-should-i-do-if-my-child-isn-t-reaching-milestones-like-other-kids