They want to add to their panda brood.

A zoo in Mexico will artificially inseminate a female panda in the hopes that its panda family will grow.

The Chapultepec Zoo in Mexico City announced that it will conduct the procedure on its giant panda Xin Xin, a 22-year-old female.

Mexico City Environment Secretary Martha Delgado said Thursday that two Chinese experts on panda reproduction will arrive in the coming days. The insemination is expected to take place next April.

Pandas are notoriously difficult to breed in captivity. Females are in heat for only a few days a year and male pandas often fail to respond.

No baby panda has been produced at the Chapultepec zoo since Xin Xin was born in 1990.

Xin Xin, whose name means Hope, is the third generation born from a pair of pandas given to Mexico by China in 1975 as a symbol of friendship between the countries.

The news comes the same day a Tokyo zoo announced that a panda had been born there for the first time in 24 years. Tokyo's popular Ueno Zoo says the panda was born Shin Shin, a 7-year-old panda who was brought to Japan from China just before Japan's devastating earthquake and tsunami last year.

The panda, the first one born at the zoo since 1988, was conceived naturally – a rarity among pandas in captivity.

The birth of Shin Shin's baby was much anticipated in Japan, and the news was flashed on major television networks Thursday.

In May, the National Zoo in Washington, D.C. live tweeted the artificial insemination of Mei Xiang, a female giant panda, that failed to mate on her own. They said then it was the final attempt to impregnate her.

There are only 1,600 giant pandas left in the wild. They are native to parts of China, Myanmar and Vietnam.

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