22 months
The gestation periods of other animal reveals that the length of the gestation period is largely a matter of the animal specie's size. Asian 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.  Long-suffering Asian elephant Azizah was carrying her baby for 700 days - 84 longer than the average-and finally gave birth at ZSL Whipsnade Zoo, Bedfordshire, last Tuesday. It is believed to be the longest pregnancy ever recorded at the British zoo-nearly two extra months over the normal gestation period of 22 months. And the baby, at just 16 stone (104kg) at birth, is the smallest in Whipshade's history. Scroll down to watch the baby elephants playing at Whipsnade Zoo this week. Report Abuse. Elephants are the largest land animals.[1] The elephant's gestation period is 22 months, the longest of any land animal. At birth it is common for an elephant calf to weigh 120 kilograms (260 lb). An elephant may live as long as 70 years, sometimes longer. The largest elephant ever recorded was shot in Angola in 1956. It is probably the elephant's enormous size and slow development that make this relatively long gestation period necessary. In this period an elephant calf develops to its full weight at birth of around 100 to 150 kg. Source(s): http://www.funadvice.com/q/for_how_long_... The mystery of the elephant's long pregnancy has been unravelled by scientists. A quirk of biology allows the unborn calf to develop in the womb for almost two years, giving it the brain power it needs to survive from birth.  Both African and Asian elephants have a pregnancy that approaches two years—22 months, to be exact. This is the longest gestation period for any land animal, and one —of the longest for any animal on earth. Elephants produce one baby at a time, and the youngster weighs around 105 kilograms (230 pounds) at birth.  An elephant calf can weigh up to 260 pounds! An adult African elephant can weigh more than 15,000 pounds. http://answers.ask.com/Science/Other/how_long_are_elephants_pregnant_for. The gestation period of an average elephant is 22 months, or 630-660 days. The elephant has the longest gestation period of any mammal. http://wiki.answers.com/Q/How_long_is_a_elephant_pregant_for. Duration [edit]. For most species, the amount a fetus grows before birth determines the length of the gestation period. Smaller species normally have a shorter gestation period than larger animals. For example, a cat's gestation normally takes 58–65 days while an elephant's takes nearly 2 years (21 months). However, growth does not necessarily determine the length of gestation for all species, especially for those with a breeding season.
http://www.sjsu.edu/faculty/watkins/gestation.htm http://www.dailymail.co.uk/news/article-2054522/Elephant-gives-birth-year-pregnancy--longest-recorded-British-zoo.html https://answers.yahoo.com/question/index?qid=20081001165214AAy23go http://www.bbc.com/news/health-18507515 http://www.allaboutwildlife.com/endangered-species/how-long-do-elephants-stay-pregnant/7445 http://www.themedicalquestions.com/Pregnant/how-long-is-a-elephant-pregnant-for.html https://en.wikipedia.org/wiki/Gestation_period
how long is a pregnancy for an elephant