A female beluga whale will have one calf every 3 or 4 years.

The longest animal on record is a female blue whale, 29.9m long.

Both male and female whales reach puberty at approximately eight years of age.

But scientists who monitor the species also had reason to cheer, this time about another female right whale, called Calvin.

Most years one, two or three adult female whales arrive between late May and August, giving birth within days of their arrival.

The "something" turns out to be a female gray whale, whose baby becomes separated from her.

The female blue whale can calve every two to three years, though no one knows where blue whales go to breed.

Ocean World tells the story of a female humpback whale as she journeys to her northern feeding grounds.

This was a female whale, I cried.

It has been suggested that humpback songs communicate male fitness to female whales.