Ovulation Predictor

Find your most fertile days and ovulation window.

Ovulation Predictor

Calculate your most fertile days and ovulation window based on your menstrual cycle.

Processed Locally

Your Cycle Details

First day of your last period

Average Cycle Length

Sperm can live inside the female reproductive tract for up to 5 days, but an egg only survives for 12-24 hours after ovulation. Your fertile window takes this into account.

Enter your last period date to see your prediction.

Initializing Engine

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Ovulation Predictor

Find your most fertile days and ovulation window.

Ovulation Predictor

Calculate your most fertile days and ovulation window based on your menstrual cycle.

Processed Locally

Your Cycle Details

First day of your last period

Average Cycle Length

Sperm can live inside the female reproductive tract for up to 5 days, but an egg only survives for 12-24 hours after ovulation. Your fertile window takes this into account.

Enter your last period date to see your prediction.

Initializing Engine

Loading tool assets...