A very unusual baby was born in in Mexico this week. Blanca Rosa de Leon Garcia gave birth to a bouncing boy that weighs more than 13 pounds, about the size of a three-month-old infant.

The head of Mexico’s National Institute of Health says the newborn’s size is “exceptionally rare.” Only about about 1 in 40,000 babies are that big at birth, he estimated.

Salvador Garcia, the baby’s father, said the family is “very happy.”

“We didn’t expect this though, now we have to buy bigger clothing because what we have is not going to fit,” he said.

Pedro Garcia was delivered by Caesarean section.

A baby born weighing 6.6kg (14.5lbs) has caused a sensation in Mexico with crowds gathering at the windows of a maternity unit to catch a glimpse.

The bouncing boy, nicknamed Super Tonio, is wearing nappies designed for six-month-olds and guzzling 5oz milk every three hours.

Antonio Vasconcelos was born by Caesarean section at Cancun’s Jesus Kumate Rodriguez hospital.

The hospital’s director said the baby is healthy despite high blood sugar and a slight blood infection, both of which are under control.

Nurses in the hospital joked as they placed “Super Tonio” next to another newborn baby.

Dubbed “Super Tonio”, he startled staff at the Jesus Kumate Rodriguez hospital in Cancun, Mexico, not to mention his mother, by arriving via caesarean section on Monday weighing a whopping 6.6kg (14lb 8oz), roughly twice the average weight for a newborn baby.

Crowds have gathered at the windows of the hospital’s nursery ward to marvel at Antonio, who is already 56cm (22in) long and drinks prodigious amounts of milk.

In January 2005, a Brazilian baby arrived weighing 7.6kg. According to the Guinness Book of World Records, the heaviest baby was a boy born to a healthy mother in Italy in September 1955 weighing 10.2kg.