How many days before menstruation is the chance of pregnancy higher?

Normal female friends have a menstrual period of several days every month, and the remaining time can be divided into a dangerous period and a safe period. The dangerous period is the time of ovulation. If you have sex at this time without taking any contraceptive measures, the possibility of pregnancy is very high. There is no ovulation during the safe period, so you will not get pregnant even if you do not use contraception during this period. So, when is the safe period and when is the dangerous period?

Generally speaking, the ovaries of women of normal childbearing age release only one egg per month. The egg can survive 1 to 2 days after being released, and the sperm can survive 2 to 3 days in the female reproductive tract. The fertilization ability is mostly within 24 hours after ovulation. After 2 to 3 days, the sperm loses the ability to combine with the egg. Therefore, if you have sexual intercourse 2 to 3 days before ovulation and 1 to 2 days after ovulation, you may get pregnant. This period is called the fertile period or the dangerous period.

A woman's ovulation date is generally about 14 days before the next menstrual period. To be on the safe side, we call the 5 days before and 4 days after ovulation, together with the ovulation day, a total of 10 days, the ovulation period. The rest of the time except the menstrual period is called the safe period. The safe period is divided into the safe period before ovulation and the safe period after ovulation. The period from the end of menstruation to the day before ovulation is the safe period before ovulation. From the first day after the end of ovulation to the day before the next menstrual cramps is the safe period after ovulation.

The safe period after ovulation is safer than the safe period before ovulation. This is because some women sometimes affected by environmental changes and mood swings affect the advance of the ovulation, so before the safe period ovulation will be shortened, but did not know their own, so before the safety period ovulation is not safe. The opportunity that the ovary has row two eggs in a menstrual cycle is very rare, that is, after ovulation to the next menstrual cramps before this period of time usually won't happen again the second time of ovulation, so the safety period after ovulation is relatively safe.

The calculation of the safe period and dangerous period mentioned above is based on people with very accurate menstrual cycles. Some people's menstrual cycles are not very accurate, so there will often be some discrepancies in the calculation of the dangerous period or safe period. Therefore, sometimes the safe period is not completely safe and should be paid attention to. However, relatively speaking, the two days before menstruation are relatively safe.