At 4 months, a baby typically can hold his/her head steady without support, and at 6 months, he/she begins to sit with a little help. At 9 months he/she sits well without support, and gets in and out of a sitting position but may require help. At 12 months, he/she gets into the sitting position without help.

When should I train my baby to sit?

Baby milestones: Sitting

Your baby may be able to sit up as early as six months old with a little help getting into the position. Sitting independently is a skill that many babies master between 7 to 9 months of age.

Can a 3 months old baby sit?

When do babies sit up? Most babies can sit with help between 4 and 5 months old, either with a little support from a parent or a seat or by propping themselves up on their hands, but it definitely varies from baby to baby.