How to calculate the so called safe period and dangerous period for girls

The safe period is further divided into the pre-ovulation safe period and the post-ovulation safe period. The period from the day of menstruation to the day before the start of ovulation is the safe period before ovulation. The safe period after ovulation is from the first day after ovulation ends to the day before the next menstrual period.

The post-ovulation safe period is safer than the pre-ovulation safe period. This is because some women sometimes ovulate early due to environmental changes and mood swings, so that the pre-ovulation safe period will be shortened, and they do not know it, so the pre-ovulation safe period is not very safe. The chance of the ovaries to ovulate twice in a menstrual cycle is very rare, that is, the period between ovulation and before the next menstrual cramp generally does not occur a second ovulation, so the safe period after ovulation is relatively safe.

Don't bother too much.

That is, the first 7 and the back 8 ......

For women with regular menstruation, it is necessary to calculate your ovulation period, the safe period, according to your menstrual regularity.

Do you first calculate when your next menstrual period will come? Can you count your next period?

For women with regular menstruation, you calculate when your next period will come, and the first day of your next period is minus 14 days. This day is the day of ovulation. If the next menstrual period should come on the 30th of the next month, then the ovulation day of the next month should be the 16th.

The first 4 days and 5 days after ovulation are the danger period (i.e., ovulation). For example, the woman's danger period, that is, the ovulation period, should be 12-21. During this period, it is easy to get pregnant.

A date other than the danger period is the safety period. However, it is only less dangerous, and it is still possible to get pregnant.

Generally speaking, 3 days after menstruation and 3 days before menstruation is an absolutely safe period, and you will not get pregnant, and you will not get pregnant without any contraception. Don't worry. Mainly due to the absence of ovulation at this time and the condition of implantation in the uterus at this time.

The first 7 days and the last 8 days of the month.

The menstrual cycle refers to regular, periodic uterine bleeding. Along with this bleeding, there should be follicle maturation, ovulation and corpus luteum formation in the ovaries, and changes in endometrium hyperplasia and secretion. Ovulation is affected by the endocrine hormones of the pituitary gland and ovaries and presents periodic changes, the length of the cycle is the same, both are 1 cycle per month, and ovulation occurs in the middle of two menstruation.

Women's menstrual cycles can be long and short, but the interval between the day of ovulation and the start of the next menstrual period is relatively fixed, usually around 14 days. The calculation method is calculated from the first day of the next menstrual period, and the 14 days backward or subtracted 14 days is the ovulation day, and the ovulation day and the first 5 days and the last 4 days together are called ovulation. For example, if a woman's menstrual cycle is 28 days, and the first day of this menstrual period is on December 2, then the next menstrual period will be on December 30 (December 2 plus 28 days), and then subtract 14 days from December 30, then December 16 is the day of ovulation.

Ovulation is the day of ovulation and the 5 days before and 4 days after, that is, from December 11 to 20. In addition, in the menstrual cycle, except for the menstrual period and ovulation period, the rest of the time is the safe period, so in the menstrual cycle, there is a pre-ovulation safe period and a post-ovulation safe period. In fact, this is also the theoretical basis of the rhythm contraceptive method.

However, to calculate the ovulation period with this method, we must first know the length of the menstrual cycle, so as to calculate the accurate time of the next menstrual cramp, and then to calculate the ovulation period, so this method can only be applied to women who have always had a normal menstrual cycle. For women with irregular menstrual cycles, it is impossible to calculate the date of the next menstrual period. Therefore, it is not possible to calculate the date and period of ovulation.

The first 7 days of menstruation and the last 8 days are it. Not as much trouble as it was said upstairs.

Generally, the first seven days of menstruation are about the same as the last eight days of menstruation.