An elephant is pregnant for up to two years before giving birth, the longest gestation period of any mammal. Elephants are the largest living and largest-brained land animal in the world, and a long development is needed for elephants in the womb.
Female elephants typically only have one calf per pregnancy. They get pregnant every four to five years. Calves are usually born during the wet season. They can weigh up to 260 pounds at birth.
For the first 90 days of their lives, young calves rely only on the nutrition from their mother's milk. After that period of time, they are able to begin to forage for vegetation and use their trunks to collect water. They still continue to suckle milk to supplement their diets up until the mother elephant gives birth again.