Giant Panda Mating (rare video)

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Initially the primary method of breeding Giant Pandas in captivity was by artificial insemination, as they seemed to lose their interest in mating once they were captured. This led some scientists to try extreme methods such as showing them videos of giant Pandas mating and giving the males Viagra. Only recently have researchers started having success with captive breeding programs, and they have now determined that Giant Pandas have comparable breeding to some populations of the American Black Bear, a thriving bear family. The current reproductive rate is considered one young every two years. Giant Pandas reach sexual maturity between the ages of four and eight, and may be reproductive until age 20. The mating season is between March and May, when a female goes into her estrous cycle which lasts for two or three days and only occurs once a year. When mating, the female is in a crouching, head-down position as the male mounts her from behind. Copulation time is short, ranging from thirty seconds to five minutes, but the male may mount her repeatedly to ensure successful fertilization. The gestation period ranges from 95 to 160 days. Cubs weigh only 90 to 130 grams (3.2 to 4.6 ounces), which is about 1/900 of the mother's weight. Usually, the female gives birth to one or two cubs. Since cubs are born very small and helpless, they need the mother's undivided attention, so she is able to care for only one of her cubs. She usually abandons one of her cubs, and it dies soon after birth. At this time, scientists do not know how the female chooses which cub to raise, and this is a topic of ongoing research. The father has no part in helping raise the cub.


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