How to Track Ovulation with Irregular Periods

Having irregular periods (cycles shorter than 21 days, longer than 35 days, or varying by more than a week) can make trying to conceive feel like a guessing game. The standard "Day 14" ovulation advice simply doesn't apply to you. But don't worry—you can still find your fertile window.

Why is My Period Irregular?

Common causes include PCOS (Polycystic Ovary Syndrome), thyroid issues, stress, or significant weight changes. It's always a good idea to chat with a doctor, but while you do, here is how to track proactively.

Method 1: Cervical Mucus (Your Best Friend)

Since you can't rely on dates, rely on biology. Your body produces specific fluid when you are fertile, regardless of what day it is.

• Look for egg-white consistency mucus. When you see it, you are likely fertile, even if your cycle is on Day 45.

Method 2: Basal Body Temperature (BBT)

BBT confirms ovulation after it happens. For irregular cycles, this is crucial because it proves you are actually ovulating (some irregular cycles are anovulatory).

Method 3: Ovulation Tests (Use with Caution)

If you have PCOS coverage, OPKs can sometimes give false positives because LH levels might be persistently high. If you don't have PCOS, buy bulk strips (cheap ones) and test once you see fertile mucus.