Ovulation Date Calculator

What's ovulation date?

As the name suggests, ovulation date means the day you ovulate. About 400 eggs, at most 500, will be released thru ovulation over a woman's life. In general, ovulation occurs only once a month and it is subject to environment, mood, physical condition, sex life, contraceptives and other factors. Eggs generally survive for 12 to 24 hours. It has also been reported that the "strong" eggs can survive for 48 hours. The ovulatory period lasts for 10 days, including 5 days before the ovulation date and 4 days after that. If you have sex during this period, the conception probability will be higher.

Ovulation Date Calculator

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How to calculate ovulation date?

The menstrual cycle of women varies but the interval between the ovulation date and the start of next period is somewhat fixed, generally 14 days. Based on such relationship between ovulation and menstruation, the ovulatory period can be reckoned. After a period of testing, you can use the following formula to calculate the ovulatory period: if you have a regular menstrual cycle, just count back 14 days from the next period to determine the ovulation date, and then add the 5 days before that and 4 days after that, you will get your ovulation period.

For example, if your menstrual cycle is 30 days and the last period starts on May 29, then the next period will start on June 29 (add 30 days to May 29); subtract 14 days from June 29, you will get the ovulation date of June 15. In this way, the ovulation period will last 10 days from June 10 to June 19.

If your menstrual cycle is irregular, then use the following formula: the first day of ovulation period = the shortest menstrual cycle – 18; the last day of ovulation period = the longest menstrual cycle – 11.

Ovulation Signs

You may find some subtle changes in your body during the ovulation period. Then what are the ovulation symptoms and signs? How to determine whether you are in an ovulation period? In general, you can observe the decrease in basal body temperature (BBT) and the increase of cervical mucus and even can feel the ovulation pain on the ovulation date. Following are the obvious symptoms of ovulation:

1. Decrease in basal body temperature (BBT)
Your BBT will go up during the days leading up to ovulation but on the ovulation day, it will decrease suddenly. On the day after the ovulation, it will increase again.

2. Increase in cervical mucus
On the day you ovulate, you will find the increase in cervical mucus and it is thin and clean. In the first half of the menstrual cycle, there is no cervical mucus and your vulva can be very dry. After that, you may find a little of thick, sticky and opaque mucus. But as the ovulation approaches, progesterone reaches the peak with the secretion of estrogen and cervical mucus will increase and become thin and clean.

3. Ovulation pain
As the ovulation comes, you may feel the pain in venter inferior. However, this is relative to the population. Some women are unaware of ovulation pain while others can feel it clearly. When you ovulate, you may feel pain clearly in abdomen.