Understanding Your Menstrual Cycle: A Month-by-Month Guide

Most of us are taught that a period is just the few days of bleeding, but that's only one phase of a cycle that's working in the background all month. Understanding the full cycle makes it much easier to notice when something is actually irregular versus normal month-to-month variation.

The follicular phase starts on day one of your period and lasts until ovulation, roughly the first half of the cycle. This is when the body is preparing and releasing an egg, and energy levels for most women tend to be highest here. Ovulation itself is typically a single day around the midpoint, though it can shift earlier or later depending on cycle length.

The luteal phase follows, lasting about 12-14 days regardless of how long the rest of your cycle is. This is where PMS symptoms — mood changes, bloating, breast tenderness — tend to show up, caused by the rise and fall of progesterone.

A 'normal' cycle can range anywhere from 21 to 35 days, so don't compare yours to a friend's. What matters more is consistency for you — a cycle that suddenly changes length, or bleeding that becomes much heavier or more painful than usual, is worth bringing up at your next visit.