Answer the following question given this paragraph: 

Egg production in the ovary is part of the menstrual cycle. The menstrual cycle is a series of changes in the reproductive system of mature females that repeats every month on average. These changes include the development of an egg and follicle in the ovary.


Q: What is the name for a series of changes in the reproductive system of mature females that repeats every month on average?


A:
menstrual cycle