In 2006 Xuang Xuang was deemed too heavy to mate and put on a low carbohydrate diet to lose 15 pounds Photo: AP
Pornographic films and weight loss regimes could not put nine-year-old Xuang Xuang and his eight-year-old partner Lin Hui in the mood for love.
But temperatures as low as 4 degrees centigrade at the zoo in Chiang Mai in northern Thailand have provoked Lin Hui to follow her partner around their enclosure.
"The female panda is fully mature. She sometimes approaches Xuang Xuang but he is not ready to respond," the zoo chief Sophon Dumnui told the Bangkok Post. "We hope they can have the perfect time together soon."
In 2006 Xuang Xuang was deemed too heavy to mate and put on a low carbohydrate diet to lose 15 pounds. He was then shown videos of pandas coupling but to no apparent effect.
The following year keepers attempted to artificially inseminate Lin Hui with Xuang Xuang's sperm and failed again.
"Given this wonderful weather we are hoping that this year they will successfully produce offspring," said Mr Sophon.
Tropical Thailand normally experiences just a few days of cooler weather around this time of year but the current cold spell has been more prolonged and cooler than usual.
Newspapers have dubbed it "the big frieze" and last week even published a picture of people examining some frosty ground – an almost unknown phenomenon in Thailand.
Night time centigrade temperatures in the low single figures have led to a state of emergency being declared in some northern districts after reports of people dying of cold.
Mr Sophon said that some of the animals in Chiang Mai zoo, such as snakes and fish, are also at risk from the weather.
"Keeping warm is very important for the animals right now," he said.
"We turn on the spotlights and prepare hay to keep them warm," he said.