Posted at: 01/24/2013 10:50 AM
By: The Associated Press
ALBUQUERQUE, N.M. (AP) - Sarah the orangutan at the Albuquerque zoo is pregnant, and the zoo says keepers are surprised because she was on birth control.
Average gestation of orangutans is seven months, but the zoo says the surprise pregnancy makes calculating a precise due date difficult.
But they say ultrasounds suggest that the orangutan is about five months pregnant and that the birth should take place in the next three months.
Primate supervisor Debbie Wiese says the ultrasounds shows a healthy baby. Sarah gave birth four years ago.
One of the twins died shortly after birth.
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