Just as they enter their adulthood, they find a mate and mate during the mating season for reproduction.

Reproduction of dolphins, which normally occurs during the spring months, closely resembles that of land mammals. Usually dolphins can court or "play", (term referred to courting), for days. They act in unity and care for each other by swimming together and petting each other with their fins. The actual mating is brief and it lasts only one to two seconds. During fertility, female dolphins have short periods in every few years. Gestation is the pregnancy time period of a female dolphin and it ranges between 11 to 12 months. Nature has planned the delivery of the baby dolphin in such a way that first the tail is delivered because if the head was to come first then there wouldn't be adequate time for it to reach the surface to breathe. Female dolphins are gifted to retain their milking ability even after they lose the ability to make babies.

During the delivery, a pack of female dolphins gather to protect any other dolphin from intruding. After birth, the calf follows its mother closely, who is capable of swimming and breathing within the first few minutes. The newborn is usually paler than the adults. But it frequently keeps milking it self which helps it to grow rapidly. The milk is rich in calcium, phosphorus, fat, and proteins.

The adult males love to associate with groups of females, or move between them.  They are free of responsibilities and just wander about; the only role they play is to mate. Whereas the adult females are the one who make all the decisions. They are the one who decide how to protect and feed their young ones. They also act cooperatively and help out each other in every situation.