Conditions · Neurodevelopmental disorders

Developmental delay (under 5s)

Clinical name: Global Developmental Delay

When a young child is behind across several areas. A signal to look and help early, not a final verdict.

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Clinically reviewed by [Reviewer name, credentials] Last reviewed: June 2026 8 min read

At a glance

What it is

Global developmental delay describes a child under five who is significantly behind expected milestones in several areas at once: movement, speech and language, thinking and learning, and social and self-care skills. It is used for young children precisely because they are too young for the detailed testing that an older child can do; it names a concern and triggers support while the fuller picture becomes clear with time.

Some children with early delay catch up; others are later found to have a specific condition such as intellectual disability, autism, a hearing impairment, or a physical cause. The delay is a signal to look and to help, not a sentence.

Why early action matters

The first years of life are when the brain is most changeable, which is exactly why early support has such leverage. Identifying the causes that can be treated (hearing loss, vision problems, nutritional deficiencies, thyroid problems, some genetic and metabolic conditions) can change a child's trajectory, and early therapy and stimulation help regardless of the eventual diagnosis.

For parents this is the hopeful part: waiting to see is the costliest choice. A delayed child who gets early hearing tests, nutrition support, stimulation and therapy does better than one whose concerns are dismissed with reassurance that boys talk late or that the child will outgrow it.

Developmental delay in the African context

When a young child is slow to reach milestones like sitting, walking, talking, or playing, families here are often told to simply wait, or that it is a curse or the result of bad luck, and the chance to act early can be lost. Yet this is the period when support helps most. Some causes are preventable or treatable, and assessment can find issues, such as hearing or vision problems, nutritional deficiencies, or treatable medical conditions, that change a child's path. Stigma and scarce services are real barriers. The most important messages are that early action matters greatly, that a delay is not a moral or spiritual judgement on the family, and that help, stimulation, and inclusion can make a lasting difference.

Helping the child

Early, loving, practical action matters most.

  • Act early rather than waiting, since support in the first years has the greatest effect.
  • Seek assessment for treatable contributors such as hearing and vision problems, nutrition, and medical conditions.
  • Talk, play, sing, and interact richly with the child every day, which is powerful, free stimulation.
  • Include the child fully in family and community life, and seek early-intervention or therapy services where available.
  • Connect with other families and support. Our Get Support page can help.

When to seek help

Seek assessment if a young child is clearly behind in several areas, loses skills they had, or is not responding to sound or to people. Ask specifically for hearing and vision checks. Early intervention services, where available, are worth pursuing energetically; our Get Support page can help you start.

Sources

  1. American Psychiatric Association. (2022). DSM-5-TR.
  2. Bellman, M., Byrne, O., & Sege, R. (2013). Developmental assessment of children. BMJ, 346, e8687.
  3. World Health Organization & UNICEF. (2023). Nurturing care for early childhood development.
This entry follows The Mind Project's editorial policy. It is general information, not a diagnosis; only a trained clinician can diagnose. Diagnostic definitions follow the DSM-5-TR (American Psychiatric Association, 2022), described here in original plain language.

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