A female giraffe is called a cow. Female Rothschild giraffes are about 15 feet tall, while reticulated giraffe cows grow to about 15 ½ feet.
Female giraffes give birth standing up 15 to 16 months after mating. Usually only one infant is born, but twins are possible. Mothers bestow a great deal of attention on the infants. After they are about one month old, mothers and calves join a crèche, which is a cooperative care group. Mothers take turns watching calves, so all of the adults have more time to feed. However, each mother nurses her own calf. After about one year, the mother and her offspring are ready to leave the group.