Babies typically start to sit up on their own between 6 to 9 months of age. Earlier signs of readiness may appear around 4 to 6 months when they begin developing the necessary head control and muscle strength. By about 7 to 9 months, most babies can sit independently without support, allowing them to explore their surroundings new ways.

Development stages for sitting up

• Around 4 to 6 months: Babies show signs of readiness such as good head control and pushing up during tummy time.
• Around 6 months: Babies may sit with support or in a tripod position (using hands for balance).
• By 7 to 9 months: Most babies can sit independently for extended periods without support.
• Around or after 9 months: Babies sit well without support and can transition in and out of sitting positions.

How to help babies learn to sit up

• Encourage tummy time to strengthen neck, back, and torso muscles.
• Support the baby in seated positions and gradually reduce support.
• Use toys to motivate balance and reaching while sitting.
• Avoid prolonged use of baby seats that restrict natural wobbling and muscle building.

While individual variation is normal, sitting up independently is an exciting milestone that usually happens between the second half of the sixth month and the end of the ninth month.