Menstrual periods are different from woman to woman and month to month. Use this calculator to see when you may be ovulating to help find your most fertile days.
Ovulation Calculator
When did your last period start?
E.g. 18/01/2020
Usually, how long is your cycle?
Cycles typically vary from 23 to 35 days
likelihood of ovulating today
Due to your cycle length, unfortunately we can't estimate an ovulation probability. We recommend that you use a Digital Ovulation Test to accurately detect your most fertile days.
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Start of your last period
20%
Likelihood of ovulating on this date
In partnership with Clearblue®.
Results are based on the information you have provided and data from the publication below: Sarah Johnson, Lorrae Marriott & Michael Zinaman (2018): “Can apps and calendar methods predict ovulation with accuracy?”, Current Medical Research and Opinion, DOI:10.1080/03007995.2018.1475348
Results are based on the information you have provided and data from the publication below: Sarah Johnson, Lorrae Marriott & Michael Zinaman (2018): “Can apps and calendar methods predict ovulation with accuracy?”, Current Medical Research and Opinion, DOI:10.1080/03007995.2018.1475348
NOTE: This tool cannot and should not be used to prevent pregnancy. Results are estimates and actual ovulation will vary for each woman.
Signs of Ovulation
- Rise in basal body temperature, typically 1/2 to 1 degree, measured by a thermometer
- Higher levels of luteinizing hormone (LH), measured on a home ovulation kit
- Cervical mucus, or vaginal discharge, may appear clearer, thinner, and stretchy, like raw egg whites
- Breast tenderness
- Bloating
- Light spotting
- Slight pain or cramping in your side
