[custom_adv]
The results showed that children younger than 9 months of age were unable to go up or down stairs at all, or were only able to go up. By around 13 months, most infants could go upstairs and about half could ascend and descend stairs.
Check Also
The latest photos from Setayesh Rajai-Nia
Setayesh Rajai-Nia, professionally known as Setayesh Nia, is one of the promising young actresses of …