One of the characteristics shared by most mammals is that they take care of their babies while they are young to teach them the necessary skills to get their food.
After born, young dolphins are nursed by their mothers, feeding them with milk produced by the mother
Bottlenose dolphins start their gestation period with the copulation of a couple. After 12 months gestating they give birht ot a single calf
Dolphin babies are born after a long gestation period inside mothers which can range between 11 and 18 months.