Babies start sitting up on their own by six months of age. Sitting prepares the baby for other milestones such as standing and walking. To help them sit, you can support their back and encourage ...
Baby Center (worldwide) on MSN5 个月
When do babies start to sit up?
Talk to your baby's doctor if your little one: Can't hold their head up steadily by the time they're about 4 months old Can't ...