Offspring

Giant pandas mate in the spring. After mating, the female will be pregnant for 100 to 180 days. Then, she will give birth to one or two cubs. Cubs weigh only 3 to 5 ounces when they are born, according to the San Diego Zoo and are completely blind at birth. 

At 18 months, the cub is weaned and sent to live on its own. By the time the females are four to five years old and the males are six to seven years old, the cubs are fully mature.

Resource: https://www.livescience.com/27335-giant-pandas.html