You’ve heard of the four stages of the menstrual cycle—menstrual, follicular, ovulation, luteal—but, truth be told, it’s been years since you took a sex-ed class and you could use a refresher course.

Millions of women are syncing their routines to their cycle. Here's what the research actually says about whether it works.

How to Train With Your Hormones Cycle syncing workouts are helping more people train in harmony with their bodies. By ...

Cycle syncing has moved from wellness blogs to mainstream conversation, fueled by a femtech industry valued at $66.2 billion ...

Cycle-based workouts have exploded across femtech apps, wearables and social media in 2025. But the science is more divided than the trend suggests, and the answers depend on which phase, which goal ...

Your cycle already knows when you should work harder eat more and rest. Here are your biggest questions finally answered.

A study of 1,474 Clue app users found that women vaccinated against COVID-19 during the follicular phase had higher odds of ...

The current expectation is that every ovulatory menstrual cycle will have a luteal phase (the time from egg released until the next flow) that lasts approximately 14 days. It is simple, ovulation ...

Throughout the follicular phase, a single "dominant follicle" develops faster than the rest. This follicle (a fluid-filled sac in your ovary) then releases more estrogen into the body in preparation ...