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Let's find the average length of your menstrual cycle.
Enter the day of the first day of each cycle below starting with the most recent
Most recent cycle
1 cycle past
2 cycles past
3 cycles past
For the best outcome, we recommend to use an ovulation prediction kit (OPK) to predict your ovulation. Select a kit:
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Clearblue ovulation prediction kit
EPT ovulation prediction kit
First Response ovulation prediction kit
Other ovulation prediction kit
I am NOT using any ovulation prediction kit