Gosiame Thamara Sithole's husband says they were astonished by decuplets after scans only showed eight in the womb.
"It's seven boys and three girls. I am happy. I am emotional. I can't talk much," her husband Teboho Tsotetsi told Pretoria News after the birth.
One South African official confirmed the births to the BBC, however another said they were yet to see the babies.
A family member, who did not want to be identified, told the BBC that Ms Sithole had had 10 babies - five via natural birth and 5 via caesarean section.