Why Is My Cycle Irregular?
The actual causes, the tests to ask for, and what “regulating your cycle” really means.
“Go on the pill” is not a diagnosis. This guide walks through what actually causes irregular cycles, the four blood tests that belong in a first workup, and what it takes to genuinely regulate a cycle rather than cover it up.
Hormonal contraceptives do not regulate your cycle — they replace it. The bleeding during the placebo week is a withdrawal bleed, not a period, and it arrives on schedule because the packet says so, not because your body did. If your cycle was irregular before you started, it will generally be just as irregular when you stop. Regularity is a symptom, and treating a symptom by hiding it is a legitimate choice — but you should get to make it knowingly.
The causes, the blood tests, and the appointment worksheet
The real causes in order of likelihood, the short initial workup, how to actually regulate a cycle, and the fill-in chart that shapes a whole appointment. Enter your email to read it all. We send occasional articles on period and cycle health. Unsubscribe any time. We never sell your information.
Board-certified obstetrician-gynecologist, licensed in Colorado.