* Species: Different dolphin species have different reproductive rates.
* Age: Dolphins can live for several decades, and females start reproducing later in life.
* Environmental factors: Food availability, health, and overall population density can impact how many calves a female has.
* Survival rates: Not all calves survive to adulthood.
Generally, a female dolphin may have 1-2 calves per pregnancy, and she may give birth every 2-3 years. Over her lifetime, she could have a dozen or more calves.
It's important to remember that these are just averages, and there's a wide range of variation in dolphin reproductive patterns.