The menstrual cycle is controlled by hormones. Hormones are chemical messengers transported through your bloodstream that tell your organs and cells to do different things.
There are four hormones involved in the menstrual cycle (actually, there are more than a dozen, but four lead the process). Each one has a different behavior, and its levels vary throughout the process, triggering different reactions in your body. The four phases of the cycle are created depending on the amount of each hormone present at any given time.
If you have a natural menstrual cycle (if you’re not taking or using any form of hormonal birth control, pregnant, or breastfeeding), then you’re somewhere on this hormonal continuum on any given day of your cycle.
In this post, I will briefly tell you which are the five key hormones in the menstrual cycle and their most important functions: