An Indonesian woman has given birth to an 8.7-kilogramme (19.2-pound) baby boy, the heaviest newborn ever recorded in the country, a doctor said Wednesday.

The baby, who is still unnamed and is 62 centimetres (24.4 inches) long, was born by caesarean section Monday at a public hospital in North Sumatra province, a gynaecologist who took part in the operation told reporters.

"This heavy baby made the surgery really tough, especially the process of taking him out of his mum's womb. His legs were so big," Binsar Sitanggang said.

The boy is in a healthy condition despite having to initially be given oxygen to overcome breathing problems, the gynaecologist said.

"He's got strong appetite, every minute, it's almost non-stop feeding," he said.

"This baby boy is extraordinary, the way he's crying is not like a usual baby. It's really loud."

The boy's massive size was likely the result of his mother, Ani, 41, having diabetes, Sitanggang said.

She had to be rushed to hospital due to complications with the pregnancy, which had reached nine months. The baby, her fourth, was the only child not delivered by a traditional midwife.

When a diabetic mother's glucose level is high during pregnancy, the baby can receive too much glucose and grow too large, according to the American College of Obstetricians and Gynaecologists.

Indonesia's previous heaviest baby, weighing in at 6.9 kilos, was born in 2007 on the outskirts of the capital Jakarta, according to the Indonesian Museum of Records website.

(Agencies)