Passage: The males mate with all available females whose territory overlaps with theirs. Copulation takes place hanging onto a branch. Gestation lasts 130 days and births are of a single offspring. The juvenile clasps itself first to the belly of the mother and later she may park her offspring on a branch while she goes searching for food. Within three to four months the young are weaned, at about six months it leaves its mother, and at an age of eight to ten months it becomes fully mature. The life expectancy of angwantibos is at most 13 years.

Question: How long is gestation?
130 days