Predicting Panda Pregnancy Isn't Easy

Potential panda pregnancy at the national zoo is stirring big questions.
3:00 | 09/09/12

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Transcript for Predicting Panda Pregnancy Isn't Easy
gripping washington, d.C. This morning, not who will win the presidential eion or whether hillary will run in 2016, no, it's a potential panda pregnancy at the national zoo. You would think that with modern technology that zooologyists would be able to give a yes or no. Here's abc's john muller. Reporter: Are they or aren't they? Not william and kate. It's these pandas. Adored by the hoards of visitors to d.C.'S national zoo could have a new cub in a couple of weeks. The pregnancy watch is on. Mei has begun building a nest. Sounds like a done deal. But panda pregnancy is never a done deal until the cub is born. Because they have a false phenomenon called false pregnancy. The couple who came to the u.S. In 2000, had one baby cub, seven years ago, they also have had seven false pregnancies. With ultra sounds, it's impossible to tell whether it's real or fake. But so far the zoo said that signs are good. And everyone is hoping that this time it will be pa pandemonium. I mean, unbelievable. Cub in the oven. Hopefully there is. Coming up on "good morning america" -- miley cyrus' alleged stalker. The frightening arrest caught on

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