Gestation take about 7 months , which suggest 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 produce 8 – 43 live young . B. g. rhinoceros may produce as many as 60 . However , the actual number of offspring rarely exceed 24 . Neonates are 25 – 32 cm in length and weigh 25 – 45 g .