Bottlenose dolphins have a gestation period of around 12 months and they generally wait around three years in between births. Dolphins don’t have a specific mating period, they are able to mate year round. The female dolphin cares for her newborn alone, without the help of the male. Female dolphins generally only have one newborn at a time and the baby is immediately taken to the surface for oxygen after giving birth. The newborn dolphin survives off the breastmilk of the mother for around 1 to 3 years.