Before you can fully understand the phases of your infradian rhythm and how they affect your life, you have to know the basics. So, let’s start from the beginning!

First of all, the terms “menstrual cycle” and “infradian rhythm” are used interchangeably here. To be precise – the menstrual cycle IS an infradian rhythm – a biological cycle that lasts longer than 24 hours.

Terminology in much of what’s written today regarding the menstrual cycle can be confusing, as some refer to it as “the” infradian rhythm, not “an” infradian rhythm.

So, just to make sure you and I are on the same page – these terms are referring to the same thing here.

So, what is a menstrual cycle?

The scientific answer – the menstrual cycle is a complex and intricate physiological process that occurs in the female reproductive system, orchestrating a series of events in preparation for potential pregnancy.

An average menstrual cycle lasts 28 days, although individual variations can extend the duration to anywhere between 21 and 35 days. Each cycle is broken down into four phases, each with their own characteristics and affects on the body.

The menstrual cycle is intricately regulated by a delicate interplay of hormones, primarily orchestrated by the hypothalamus, pituitary gland, and ovaries.

How do you track your cycle?

The first day of your period is considered the start of your menstrual cycle. This is the time where your body is shedding the uterine lining from your previous cycle.

This menstrual flow, consisting of blood and tissue, continues for an average of 3 to 7 days. This period of time is know as your menstrual phase.

Following menstruation, the follicular phase unfolds as the ovaries release hormones such as follicle-stimulating hormone (FSH), prompting the maturation of an egg within a follicle.

Simultaneously, estrogen levels surge, contributing to the thickening of the uterine lining in preparation for a potential implantation.

The peak of estrogen triggers a surge in luteinizing hormone (LH), signaling the release of the matured egg from the ovary – a process known as ovulation. The ovulatory phase generally occurs around the middle of the menstrual cycle, approximately 14 days before the onset of the next menstrual period.

Your luteal phase is the last week of your cycle, the time right before your period begins again.

Knowing your personal cycle can have a empowering impact on your relationship with yourself and others.

These four phases each have their own impact on your body. You can learn more about each phase and how you can optimize them here.