Medical Disclaimer

This service is not a medical institution

Hedgehog Baby Note is not a medical institution, medical consultation service, diagnostic service, or treatment service. The age calculator and developmental observation checklists we provide are informational tools for caregivers to reference in daily life.

This is not the official K-DST test

This service is not the official K-DST (Korean Developmental Screening Test for Infants and Children), and we do not use K-DST's questions or scoring method. We are not affiliated with the official agency and do not substitute for its results. The national infant health checkup and developmental screening are available through the National Health Insurance Service's infant health checkup program.

Checklist results are not a diagnosis

Development checklist results are not calculated as a score or percentage, and do not judge "normal" versus "abnormal." A result is simply a summary of what a caregiver observed in daily life — not a diagnosis or evaluation. Every child develops at their own pace.

When to consult a professional

• You are concerned about your child's development
• Your child has stopped doing something they used to do
• You find it hard to observe progress in several developmental areas

In these cases, please consult a pediatrician or an official infant health checkup provider.

Content sources and review

Developmental content is based on the official developmental milestone materials from the CDC (U.S. Centers for Disease Control and Prevention), with sources and review dates shown on each piece of content (Korean pages). Our full editorial process is documented in Korean atEditorial Policy andSources.

Human medical-professional review status for this English page: pending. This page has been translated and checked for terminology, but has not yet been reviewed by a licensed medical professional in English. Please treat it as informational only.