Panda pregnancies, famously rare in captivity and outside of China, are notoriously hard to establish or predict: "If the apparent pregnancy is confirmed, we expect the baby between now and early summer," the zoo said. "It could be born any moment."
An endangered species, panda cubs are very vulnerable, being about the size of a rat, and often do not survive the first weeks. The last successful birth in Europe was in Madrid in 2013.
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