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Giraffe gestation lasts between 14 and 15 months, after which a single calf is born. The mother gives birth standing up and the embryonic sack actually bursts when the baby falls to the ground. Newborn giraffes are about 1.8 meters tall.
Gestation Periods and Animal Scale. The gestation period of humans is 266 days, 8 days short of nine months. Many such biological characteristics have an explanation in terms evolutionary survival value. Even some seemingly cultural characteristics of human society have such a biological explanation.sian elephants have a gestation period of 645 days and African elephants 640 days. Dogs and other canines have a gestation period of about 60, which is also the period for cats. Even within the species of apes and monkeys gestation period seem to be a matter of size.