Reproductive biology

Little is known of the reproductive biology of many ereth-izontids, particularly the South American species. It appears, however, that female porcupines are generally either pregnant or are lactating for the vast majority of their lives. Gestation commonly lasts about 200 days, after which the female mates almost immediately. She continues lactating for her newborns for approximately eight to 12 weeks.

Each pregnancy commonly results in one precocious offspring, which is born with fur and soft quills that harden quickly. The young generally reach adult size in about a year, and become sexually mature at about 1.5 to 2.5 years old. Coendou young have a soft orange color, significantly different from that of the adult species. All are precocious.

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