Extrapolation of the safe period of the menstrual cycle 30

If the woman's period is normal, the safe period is 7 days before menstruation and 8 days after menstruation! Commonly known as: the first seven and the last eight.

The 7 days before and after the 8 days of menstruation is the safe period.

The safe period is approximately 10 days after menstruation.

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If you want to know your safe period, you must first know your ovulation period and dangerous period.

Ovulation is usually 14 days before the next menstrual period. Then the first three days of ovulation, the same day, and the next three days, this week, are all dangerous periods.

For example, if your next menstrual period is on March 30, then your ovulation period is March 16, and the danger period is March, these seven days. (Except for these seven days, the rest of the time is a safe period).

As the name suggests, the safe period is the days other than the dangerous period.

Do you need to determine if the number of cycle days is regular? The ovulation period is determined according to the length of the cycle days, because the ovulation day is fixed, regardless of the length of the cycle, ovulation will be 14 days before the onset of menstruation, not 14 days after menstruation, 3 days before and after the ovulation day, a total of 7 days is the dangerous period, the rest are safe, and if the cycle is irregular, there is no accurate safety period even if the ovulation day is not available. Formula; The number of days in the cycle minus 14, and the remaining days plus the menstrual day is the day of ovulation.

Calculation of the safety period: extra points!

A woman's ovulation date is usually 14 days before her next menstrual period and 1 day after her next menstrual period. Lose 14 days to ovulation day. The day of ovulation and the 5 days before and 4 days after it are added together to be ovulation.

For example, a woman's menstrual cycle is 28 days. This menstruation is on December 2 for 1 day, and the next menstruation is on December 30 (December 2 plus 28 days) and then 14 days from December 30, then the 16th is the day of ovulation.

5 days before and 4 days after ovulation. The ovulation period is December 11---20 is the ovulation period.

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After the end of menstruation is counted as one week or so, the first week after the end of the period is about the safe period, the second week is about the ovulation period, the three weeks is the safe period, and the fourth week is the menstrual period.