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Signs of ovulation

How to recognize your fertile window — and time things right if you're trying to conceive.

Cervical mucus changes

As you approach ovulation, cervical mucus becomes clear, slippery, and stretchy — often compared to raw egg whites. This is the most reliable at-home sign of your fertile window.

Basal body temperature (BBT)

Your resting temperature rises about 0.5–1°F after ovulation. Charting BBT daily confirms that ovulation happened — though it tells you after the fact, so pair it with other signs.

LH surge (ovulation tests)

Luteinizing hormone spikes 24–36 hours before ovulation. An over-the-counter ovulation predictor kit (OPK) detects it in urine — the clearest heads-up that your fertile window is opening.

Mittelschmerz (ovulation pain)

Some people feel a mild one-sided twinge or cramp when the ovary releases an egg. It's harmless and a handy bonus signal if you notice it.

Breast tenderness & libido

Rising hormones can bring breast tenderness, mild bloating, light spotting, and a higher sex drive around ovulation.

Know your dates: use the ovulation calculator to map your fertile window for the next 6 cycles.

Frequently asked

When am I most fertile?

Your fertile window is the 5 days before ovulation plus ovulation day itself — about 6 days. The highest-chance days are the 2–3 days right before you ovulate, because sperm can survive up to 5 days waiting for the egg.

How accurate is tracking ovulation by symptoms?

Combining methods works best. Cervical mucus + an ovulation predictor kit gives you advance notice; basal body temperature confirms ovulation happened. Any single method alone is less reliable, especially with irregular cycles.

Can I ovulate without obvious signs?

Yes — not everyone notices mucus changes or ovulation pain. If your cycles are irregular or you have no clear signs after several months of trying, an OPK or a chat with your provider can help.

References

Sources we consult

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