Calculate Ovulation

Calculate the length of your menstrual cycle

How to calculate ovulation?

Ovulation is an essential part of a woman's menstrual cycle. It's the process where a mature egg is released from one of the ovaries. Ovulation typically occurs once per menstrual cycle and is the period when a woman is most fertile.

The moment of ovulation

Ovulation generally occurs in the middle of the menstrual cycle, but this can vary depending on the individual cycle length of each woman. Most women have a cycle length of between 21 and 35 days, with 28 days as the average.

Calculating ovulation

Ovulation can be calculated by counting days in the menstrual cycle. The day of ovulation is often determined by subtracting 14 days from the total duration of the cycle (for women with a 28-day cycle, ovulation would therefore occur on day 14). However, this method is not 100% accurate and can vary depending on each woman's individual cycle.

The fertile period

A woman's fertile period is considered to be the five days before ovulation and the day of ovulation itself. Sperm can survive in a woman's body for up to five days, so intercourse in the days before ovulation can also lead to pregnancy.

Methods to predict ovulation

There are several methods to predict ovulation, including tracking the menstrual cycle, measuring basal body temperature, and noticing changes in cervical mucus. There are also ovulation prediction kits available that detect an increase in luteinizing hormone (LH) in the urine, which occurs just before ovulation.

Important considerations

It's important to remember that, while understanding and tracking ovulation can be useful for both trying to conceive and for contraception, none of these methods are 100% reliable. Women who need contraception should use a reliable method of birth control, and women trying to conceive should consider consulting a healthcare provider for preconception care and guidance.