While they can live for up to 80 years, the number of calves a female will have in her lifetime is dependent on many factors, including:
* Survival rate of calves: Calves face threats from predators, entanglement in fishing gear, and climate change.
* Health and age of the mother: Older and weaker mothers may be less likely to successfully give birth and raise a calf.
* Food availability: The abundance of food in the mother's feeding grounds can influence her ability to raise a calf.
So, there's no fixed number, but it's estimated that a humpback whale could give birth to around 10-15 calves in her lifetime.