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Birla Fertility & IVF
Birla Fertility & IVF

Ovulation Calculator

While some pregnancies are organic and not always planned, others are planned all the way to the finer details to ensure that every attempt has a higher chance of success. The most important tool in this process is an ovulation calculator.

Why do we need it?

Knowing the days when your eggs will be most fertile, will ensure a higher chance of successful fertilization and therefore a successful pregnancy. Knowing your fertility window will increase your chances of a favourable outcome, in this case, a confirmed pregnancy.

Ovulation Calculator
When did your last period start?
E.g. 18/01/2020
Normal cycle length?
Cycles typically vary from 23 to 35 days
Estimate your ovulation day
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.
Start of your last period
Likelihood of ovulating on this date
Change my informations
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

How long is a fertile window?

In women, their menstrual cycle is typically 28 days long. However, every woman’s body is different. So in the case of a 28-day cycle, there will be about 6 days in each cycle when one can get pregnant. This is the time period when you are the most fertile, medically referred to as the fertile window.

Fertile windows will differ for every woman and can vary from month-to-month for the same person.

Note: The fertile window arrived at through an ovulation calculator, is used to arrive at a ballpark range of days to plan pregnancy. This is not medical advice nor a final determinant of a successful pregnancy.

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