Menstrual period is not absolute rhythm

For irregular menstruation women if caught the shorter cycles such as menstrual cycle only 21 days, she would be possible in the lifecycle of the seventh day of ovulation, menstruation from her first day of the date of the first seven days, and if her menstrual period lasts seven days, it is possible in her menstrual near the end of just starting the ovulation

Menstrual periods are not pregnant, is a lot of people understand the common sense, but common sense can only show that the vast majority of facts, not including the few exceptions.

In General, comes from a time period to the next month, this is called a menstrual cycle — if comparison of female menstrual regularity, in General is 28 ~ 30 days.

From the next period of the first day, go backwards for 14 days, the day is the female ovary of ovulatory. In General, sperm survival in ovarian age will not be more than one day, but if the ovary of temperature, humidity and conditions better, sperm can live for 3 ~ 5 days, therefore, be safe, before and after of the ovulatory generally 4 to 5 days as of danger. Then a month, in addition to the 8 ~ 10 days more dangerous, the remaining generally belong to the rhythm, including menstrual period.

However, this is in General, have the following conditions can cause menstrual period pregnant — first of all, not all bleeding are real menstrual — — female especially irregular menstruation in women can ovulation time bleeding, this time is very easy to become pregnant.

Additionally, for irregular menstruation women if caught the shorter cycles such as menstrual cycle only 21 days, she would be possible in the lifecycle of the seventh day of ovulation, menstruation from her first day of the date of the first seven days, and if her menstrual period lasts seven days, it is possible in her menstrual near the end of just starting the ovulation.

In addition, the rhythm is absolutely safe, because some sperm vitality very tenacious and even survival to practise, this can lead to unwanted pregnancies.

It is also possible, while menstruating, however, when a husband and wife together long or accident, the female mind be excessive, and facilitate emergency ovulation, pregnancy is not surprising.

Visible menstrual period is not absolute rhythm, rhythm is relatively speaking, there is no absolute rhythm.

(Edit: Zheng Yan internships, MD)