How to calculate the contraceptive cycle

For couples, if they do not plan to have children in the near future, timely contraception is very important. At this time, if you want to achieve a good contraceptive effect, in addition to using some contraceptive tools, you must also understand some contraceptive cycles, so that you can achieve a certain contraceptive effect without taking contraceptive measures. Therefore, the calculation of the contraceptive cycle is also very important. Let’s take a look at how to calculate the contraceptive cycle.

Ovulation calculation method 1: estimation method

Usually, women ovulate about 2 weeks (12-16 days) before their next menstrual period. Therefore, you can calculate it yourself based on the rules of your previous menstrual cycles. However, the ovulation period may change due to the influence of environment, disease, mood and medication, so the calculation of ovulation date should be based on actual conditions.

Ovulation calculation method 2: menstrual date calculation method

It is believed that each ovulation should occur about 14 days before menstruation, so the 5 days before ovulation to 5 days after ovulation are called "ovulation day". However, this method is less reliable because most women have irregular periods. In comparison, the first two methods are more reliable, but somewhat troublesome. Here we introduce you to a simple and more reliable calculation method, hoping it will be helpful to you. The calculation formula is:

The first day of ovulation = the number of days in the shortest menstrual cycle minus 18 days

The last day of ovulation = the longest menstrual cycle minus 11 days

Before using this formula for calculation, the individual is required to observe and record his or her menstrual cycle for 8 consecutive times to obtain the longest and shortest number of days in his or her menstrual cycle. The numbers obtained by substituting them into the above formula represent the beginning and end time of the woman's "ovulation period" respectively.

(The menstrual cycle is calculated from the first day of the current menstrual period to the first day of the next menstrual period) For example, the longest menstrual cycle of a woman of childbearing age in the first 8 months is 30 days and the shortest is 28 days. Substituting the formula into the formula is:

Ovulation day 1 = 28 days - 18 days = 10 days

The last day of ovulation = 30 days - 11 days = 19 days

That is: this woman's "ovulation period" starts on the 10th day of this menstruation and ends on the 19th day of this menstruation.

If you observe that your menstruation is very regular: once every 28 days, then you can set the longest and shortest days of your menstrual cycle to 28 days. Substituting them into the formula, you can calculate your "ovulation period" as: day 10-17 of this menstrual period.

This calculation method takes the first day of the current menstruation as the base point and counts the days forward, rather than taking the next menstruation as the base point and counting backwards, so it is not easy to make mistakes. After finding out the "ovulation period", if you want to get pregnant, you can start from the first day of the "ovulation period" and have sexual intercourse every other day for several months, and you are very likely to get pregnant. If you don’t want to get pregnant, you have to miss the “ovulation period” to have sex.