Question: how long are bowhead whales pregnant?
Answer: Females produce a calf once every 3 to 4 years, after a 13- to 14-month pregnancy. The newborn calf is about 4.5 m long and approximately 1000 kg, growing to 9 m by its first birthday. The lifespan of a bowhead was once thought to be 60 to 70 years, similar to other whales.