Mexico City, April 28: A Mexican woman Karla Vanessa Perez is pregnant with nine babies, and the expected date of birth is May 20.
The country's main broadcaster Televisa reported that Karla is expecting six girls and three boys.
Perez, who already has triplets, was described as coming from the north-eastern state of Coahuila, which borders the U.S. state of Texas, reports Daily Mail.
Karla's husband Bernardo is a car mechanic at a garage. She is currently being treated at a hospital in the state capital Saltillo.
Perez, whose age was not given, had fertility treatment with her husband Bernardo leading to the multiple pregnancy, it said.
State-owned news agency Notimex also reported the pregnancy, saying Perez was due to give birth on May 20.
'It's very early to think of names for the babies,' Perez told Notimex. 'First I hope that everything goes well.'
The successful delivery of nonuplets would be one of the highest multiple births ever recorded.
In 2009, Nadya Suleman, a woman in California gave birth to octuplets, sparking worldwide media attention.
Mother-of-14 Nadya, 36, from La Habra, was dubbed 'Octomum' has since become a television personality in the U.S..
However, since the birth of her eight new children she has faced problems and been close to being evicted from her home.
Her children are now being monitored by officials with the California Children's Services Department.
A woman giving birth to eight babies is called an Octomum, while the one who gives birth to nine babies is called a Nonamum.
Karla Vanessa Perez's children are not the first nonuplets to be born, but if they all live they will be the first to survive.
A set was born on June 13, 1971 in Sydney, Australia, to Geraldine Brodrick.
None of the five boys and four girls lived. Two were stillborn and the last to survive died six days after birth.
Nonuplets were also born on March 26, 1999, in Malaysia to Zurina Mat Saad.
She had five boys and four girls (Adam, Nuh, Idris, Soleh, Hud, Aishah, Khadijah, Fatimah and Umi Kalsom) but none of them survived more than six hours.
Nadya Suleman - or 'Octomum' - holds the world record for the most children delivered at a single birth to survive with her eight babies.
Before that, the record was held by Bobbie McCaughey, who gave birth to four boys and three girls in 1997 at the University hospital, Iowa in United State of America.
The greatest recorded number of children born to one mother in the world, according to Guinness is 69.
In 27 pregnancies, the first wife of Feodor Vassilyev of Russia gave birth to 16 pairs of twins, 7 sets of triplets and four sets of quadruplets in the 17th century.