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A single male can mate with 5–10 sows. [11] By the end of the rut, males are often badly mauled and have lost 20% of their body weight, [4] with bite-induced injuries to the penis being common. [63] The gestation period varies according to the age of the expecting mother. For first-time breeders, it lasts 114–130 days, while it lasts 133 ...