Gosiame Thamara Sithole, 37, gave birth to decuplets at a hospital in Pretoria on 7 June.
The birth is believed to have broken the record held by Halima Cisse of Mali, who gave birth to nine babies at a hospital in Morocco in May.
The new record came as a surprise to Sithole, who is from the province of Gauteng, as doctors had initially told her that she was expecting just six children.
Later scans then incorrectly revised the number to eight.
But she ended up giving birth to seven boys and three girls by caesarian section at 29 weeks.
According to Sithole, who is a retail store manager and also has twins aged six, the decuplets were conceived naturally - which is rare in similar cases of births involving large numbers of children.
The earlier stages of pregnancy had been tough, with the mother saying she had been sick and experienced leg pain and heartburn.
Sithole, who hails from the township of Thembisa in the City of Ekurhuleni Metropolitan Municipality, also expressed concern that her unborn children would not survive the high-risk pregnancy.
Thankfully, however, all 10 were born alive, and will now spend the next few months in incubators before Sithole and her husband, Teboho Tsotetsi can take the infants home.
Tsotetsi, who is unemployed, said he felt 'happy' and 'emotional' following the birth.
According to iHarare.com, he said: "It's seven boys and three girls. She was seven months and seven days pregnant. I am happy. I am emotional. I can't talk much. Let's talk again in the morning please."
Halima Cisse set a new world record in May for multiple births after successfully delivering nine babies.
While it wasn't the first time a woman had given birth to nine babies, the 25-year-old was the first woman to give birth to nine with all surviving.
According to the New York Post, she had been only expecting to have seven babies.
Mali's Health Minister Fanta Siby told Agence France-Presse after the record-breaking birth: "The mother and babies are doing well so far."
Doctors at the Ain Borja clinic in Casablanca, Morocco, later told the press agency that the premature siblings were expected to spend at least 'two to three months' in incubators'.
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