A regular period is a good sign. But when you're trying to conceive, "probably fine" doesn't feel like enough. You want to know you're actually ovulating, and when.
We hear two versions of this question all the time. How do I know I'm ovulating? And if my cycle is shorter than average, could I be ovulating too early? Here's what Ovum Health recommends.
What ovulation is
Ovulation is when an ovary releases an egg. The egg can be fertilized for roughly a day after that, but sperm can survive for several days. So your most fertile window is the few days leading up to and including ovulation.
Three ways to check
Ovulation predictor kits (OPKs). These at-home urine tests detect the LH (luteinizing hormone) surge that happens 24 to 48 hours before ovulation. Ovum Health suggests testing daily starting around day 10 of your cycle. This is the only one of the three methods that helps you time sex in advance.
Basal body temperature. Your resting temperature rises slightly after ovulation. Tracking it first thing every morning can show a pattern over time. It only confirms ovulation after it's happened, though, and many people find the daily routine stressful.
Progesterone blood test. Your provider can check your progesterone level about a week before your expected period. A level above 3 ng/mL indicates you ovulated that cycle. Like temperature tracking, it confirms after the fact.
| Method | What it tells you | Helps you time sex? |
|---|---|---|
| Ovulation predictor kit (OPK) | An LH surge, meaning ovulation is likely in the next 24–48 hours | Yes |
| Basal body temperature | A small temperature rise after ovulation | NoConfirms afterward |
| Progesterone blood test | Ovulation happened that cycle | NoConfirms afterward |
Timing sex when you're trying
Ovum Health recommends having sex on the day of a positive OPK and the two days after. If you'd rather skip testing, sex every other day starting around day 9 or 10 of your cycle covers the fertile window for most people.
Can you ovulate too early?
Not in a way that keeps you from getting pregnant. Ovulation usually happens about two weeks before your next period, so in a 26-day cycle it's often around day 12. As long as you're ovulating, you can conceive, even if your timing is earlier than the textbook day 14.
Ovum Health's recommendations
- Start with an OPK. It's the easiest method and the only one that helps with timing.
- Confirm with a blood test if you're unsure. A progesterone test is the most reliable way to know ovulation happened.
- Keep it simple if tracking gets stressful. Sex every other day through the middle of your cycle is a perfectly good plan.
- Get checked if something seems off. If your OPKs never turn positive, your cycles are irregular, or you've been trying for a while, see a doctor.
Want to be sure?
Our fertility doctors can check whether you're ovulating and what else might be going on. Visit our scheduling portal to book. Most visits are covered by insurance.
This article is for general education and isn't a substitute for medical advice. Talk with your own provider about your situation.