What does the female ovulation algorithm include?

The ovulation period is something that female friends must understand, but many female friends do not know much about it, especially about the algorithm of the ovulation period, many of our female friends are not very clear about it. All of our female friends must be aware of this special period so that they can take effective contraceptive measures and effectively avoid pregnancy.

1 Two commonly used algorithms for ovulation

The most common calculation method now is: 14 days before a woman's next menstrual period, which is also called the ovulation day. 4 days before ovulation and 5 days after ovulation add up to a total of ten days. In other words, a woman's ovulation period is generally about 10 days. This is a more commonly used algorithm.

There is another algorithm that is suitable for women with irregular menstrual periods. The menstrual cycle is unstable, and the formula for calculating the ovulation period is: the first day of ovulation = the number of days in the shortest menstrual cycle minus 18 days; the last day of ovulation = the number of days in the longest menstrual cycle minus 11 days.

For example, the shortest menstrual period is 28 days and the longest is 37 days. The shortest regular period is subtracted by 18 (28-18=10) and the longest regular period is subtracted by 11 (37-11=26). Therefore, the ovulation period is from the 10th day to the 26th day after the menstrual period. Then the ovulation period of this algorithm is as long as 16 days, and the error is relatively large.

2. How many days does the ovulation period last? It depends on the effective pregnancy time interval.

How many days does the ovulation period last? Here, we introduce 2 methods to calculate the ovulation period for everyone to understand first. So, how many days is the ovulation period? In fact, the ovulation period of each woman is different, some are longer, and some are slightly shorter. What we really want to tell you here is what is the more effective ovulation period, that is, how long is the time that can lead to conception.

First of all, we need to know how long the egg can survive?

If a woman's egg is not released, she cannot conceive even if she has many sperms. Therefore, it is more meaningful to start counting from the moment the egg is released. Generally, the survival time of female eggs can reach up to 72 hours, or 3 days, which is a very long survival time. The shortest survival time of an egg is generally 12 hours, or 0.5 days. The normal survival time of an egg is about 24 to 28 hours.

Then, the survival time range of the egg is: 0.5-3 days.

Secondly, we need to know how long the male sperm can survive in the female body.

After a man's sperm is discharged from the body, it can generally survive in the body for about 3 days. The longest record is 5 days, and the shortest is generally about 1 day. Because the number of sperm is relatively large, there is no need to be very strict about pursuing the longest and shortest sperm ejaculation time.

Then the survival time of sperm is: 1-5 days.

Well, since sperm can survive for 5 days, that means sperm can enter the female body and wait 5 days before the egg is released. If a woman has sex again within 3 days after the egg is released, then these 3 days can also be considered the effective conception time. The longest conception time interval is: 5+3=8 days. Since the shortest survival time of an egg is 0.5 days, the shortest conception interval is also 0.5 days.

In other words, the effective pregnancy time range for women is: (0.5 days < effective ovulation period < 8 days).

All female friends should know that everyone’s ovulation time may be different, and it is related to each of our physical conditions, environment, etc. We need to make a simple calculation based on the time of our menstruation. Generally speaking, the ovulation period is half a day to eight days. If you are planning to have a baby recently, you must try hard in these days.