(AP) — A 42-year-old chimpanzee whose unexpected pregnancy was discovered in February has given birth to a healthy girl.

Ginger gave Monday at the Chimp Haven sanctuary for retired research chimpanzees. Ginger's pregnancy was a surprise because every male must get a vasectomy before coming to the sanctuary in northwest Louisiana.

Since February, every male in a group with a female and still interested in breeding has been given a newer type of vasectomy. And every female is on birth control.

The baby has not yet been named. Sanctuary officials say a donor who pays $13,000-a-year to support the can name the baby. If that doesn't happen, the sanctuary will take suggestions from the public.