CHENGDU - The first male-female panda twins of this year were born in Southwest China's Sichuan province Tuesday morning.

Panda Ya Yun gave birth to the twins at the Chengdu Research Base of Giant Panda Breeding.

The female cub weighed 135.3 grams and was born at 8:20 am. The male cub followed nine minutes later, weighing 148.8 grams.

"They are the first male-female panda twins born this year. The mother and cubs are very healthy," base staff said.

Ya Yun, born on Sept 10, 2010, is the youngest child of Ya Ya, who was born on the day of the opening ceremony of the Beijing Asian Games in 1990.