During the menstrual cycle, the step that occurs first is the breakdown of the lining of the uterus.
What is menstruation?
Menstruation is the periodic discharging of the menses, the flow of blood and cells from the lining of the uterus in unfertilized females of humans and other primates.
The period of this process is called the menstrual cycle. Menstruation occurs when the egg of the female is not fertilized each month.
The stages of menstrual cycle are as follows:
- menstrual phase; when an egg from the previous cycle isn’t fertilized.
- follicular phase; starts on the first day of ones period and terminates when one ovulates.
- ovulation phase; the release of matured egg by the ovary
- luteal phase
This means that during the menstrual cycle, the uterine lining that was initially formed would be broken down first.
Learn more about menstruation at: https://brainly.com/question/27471285
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