A baby whale is a calf, his mother is a cow and his father is a bull, and together, the family is a pod. Baby whales grow in the mother's uterus from 10 to 18 months, depending on the species. A calf receives nutrients in utero through an umbilical cord.
Twin births are rare among whales, and a calf is delivered tail-first to avoid drowning. A baby whale, much like a human baby, nurses milk from his mother's nipples for several months. A calf reaches sexual maturity between 5 and 15 years, depending on the species. Whales have two seasons: mating and feeding.