About 14 days before your next period

Ovulation phase

An egg is released and the fertile window peaks. Some people notice clear signs; others notice nothing at all.

What's happening

A surge of luteinizing hormone (LH) triggers the release of an egg, usually about 14 days before your next period. The egg survives for roughly a day, but sperm can survive for several days, so the fertile window includes the five days before ovulation and the day of it.

Common signs

Tracking tools

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Calendar estimates and ovulation tests aren't reliable birth control. If you want to avoid pregnancy, talk with a clinician about methods that fit you.

Next up: luteal phase