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
What is ovulation calculator?
An ovulation calculator estimates how likely a woman is to release an egg on a particular day in her menstrual cycle.
Our ovulation calculator will increase your fertility chances.
Knowing the most fertile days in a cycle can increase a woman’s chances of conceiving and knowing the likelihood of ovulation on a specific day may help women understand their fertile window. This ovulation calculator tool estimates the days on which a woman is most likely to ovulate.
How does the ovulation calculator work?
The ovulation calculator takes the date the last period started and the average cycle length to estimate when a woman is most likely to ovulate.
How to use the ovulation calculator?
- Enters the first day of the last menstrual period on the calendar.
- Enters the average cycle length from the drop down list.
- Clicks “Estimate Your Ovulation day”
How will results be displayed and what do they mean?
Once the data is entered and ‘calculate’ clicked, a calendar will be displayed showing the days on which ovulation is likely marked in purple together with a percentage. This is a percentage chance of ovulation on that day based on the inputted data.
Can I rely on an ovulation calculator?
An ovulation calculator estimates the potential ovulation days by taking the average cycle length and the date of the last period – basically the calendar method. It should be used for informational purposes only.
How ever, detecting personal fertility hormones by using ovulation tests is a more accurate method to identify fertile days.
Ovulation tests are 2x more accurate than calendar method [1].
[1]: Study of 101 women in the UK comparing a simple calendar method to likelihood of conducting a test on LH surge day (2011).
How is an ovulation calculator different to a fertility calendar?
- An ovulation calculator estimates the likelihood of ovulation happening on a particular day.
- A fertility calendar indicates the days when sex is likely to result in conception.