 Gestation takes about 7 months , which suggests a breeding cycle of two to three years . A five @-@ year breeding cycle may also be possible . Usually , they give birth in late summer . B. g. gabonica produces 8 – 43 live young . B. g. rhinoceros may produce as many as 60 . However , the actual number of offspring rarely exceeds 24 . <unk> are 25 – 32 cm in length and weigh 25 – 45 g . 
