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- * *The sperm whale, as with all other species of the Leviathan, but unlike most other fish, breeds indifferently at all seasons; after a gestation which may probably be set down at nine months, producing but one at a time; though in some few known instances giving birth to an Esau and Jacob:—a contingency provided for in suckling by two teats, curiously situated, one on each side of the anus; but the breasts themselves extend upwards from that.Chapters 85-87 -- The Fountain; The Tail; The Grand Armada (88% in)
There are no more uses of "gestation" in Moby Dick.
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