Like all mammals, whale calves are nourished with milk from their mothers. Cetaceans breed seasonally, usually in warm tropical waters, and females usually have one calf every 1-3 years. The gestation times range from 9-18 months. Whale calves can swim at or soon after birth. Mother whales care for their young for an extended period of time, usually at least a year, feeding them milk and protecting them.
Newborns have a sparse covering of hair which they lose as adults.
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