Are you wondering when your baby will begin sitting unsupported? It won't be long!

On average, babies begin sitting up at around 6 to 8 months of age, says Michelle Baboun, a pediatric physical therapist in south Florida.

At about 6 months old, most babies can sit, using their arms propped in front of them for support. Some can sit erect without using their arms for support, but if your baby is this bold, expect loss of balance and falls to be frequent, especially with movements of the head and reaching, Baboun says.

"As babies get closer to 8 months, most have the trunk and pelvic strength to maintain unsupported sitting, can reach and move in sitting and are able to make adjustments for losses of balance," Baboun says. (If your baby was a preemie, be sure to use adjusted age.)

Brandy Stoner from Tulsa, Okla., wasn't surprised when her 6-month-old daughter began sitting – after all, the little one had been practicing for quite some time!

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