Reproduction Begin reproduction between six and nine years of age. Females cycle every 45 days until conception. Gestation is about 16 months. Calves are weaned between one and two years of age then leave the mother. Females calve every three to four years.
Females announce their receptivity through vocalizations, urine spraying and tail flagging.
An interested suitor will first chase a female in heat away from her normal area, then lead her into an area away from other male rhinos. Actual receptivity of the females lasts only a few hours. Copulation may last anywhere from 10 minutes to an hour. Multiple copulations may occur during the few hours the female is receptive. After breeding, the male has no other interest in the female and does not participate in any aspect of calf rearing.