Written & medically reviewed by Dr. Sanjay Anbu, MBBS· Last reviewed
Children reach milestones at their own pace, within broad ranges. Milestones are a guide, not a test — but a few “red flags” are worth discussing with your doctor early, because early help works best.
Not smiling by 3 months, or not making eye contact
Not sitting by ~9 months, or not walking by ~18 months
No words by ~16–18 months, or losing skills they once had
Floppy or very stiff limbs, or always using only one hand very early
Ranges are wide — but check red flags early. Milestones vary, and being a little behind is often normal. But losing skills, or clear red flags, deserve an early check — early support makes a big difference. MedDroid gives general information, not a diagnosis.
Frequently asked questions
When do babies start walking and talking?
Many walk between about 12–18 months and say first words around 12 months, but the normal range is wide. Focus on steady progress rather than exact dates.
What are developmental red flags?
No social smile by 3 months, not sitting by ~9 months, not walking by ~18 months, no words by ~18 months, or losing previously gained skills — discuss these with your doctor.
Should I worry if my child is a little behind?
Often not — children develop at different speeds. But an early check is wise if there are red flags or you have a nagging worry; early help is very effective.
Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.