Jacob Zuma, the country's current President, updated parliament on the condition of the 94-year-old, who has been in a Pretoria hospital for five days after suffering a recurrence of a lung infection.
ITV News Africa Correspondent Rohit Kachroo reports from Pretoria:
Madiba, as he is affectionately called in South Africa, was visited today by family and his ex-wife Winnie.
The 94-year-old's eldest grandson Mandla thanked doctors, politicians and well-wishers who have supported the family during the former President's illness.
It was 49 years to the day since Mandela was sentenced for sabotage and conspiring to overthrow the white-minority government.
South Africa's first black leader has a history of lung problems dating back to his time in the Robben Island prison camp near Cape Town.
He was released in 1990 and went on to serve as president from 1994 to 1999.