Excuse me, when is the critical period of the fourth menstruation?

Hello, when you say critical period, you should mean ovulation period. The ovulation day for women is usually around 14 days before the next menstrual period. After the egg is discharged from the ovary, it can live in the fallopian tube for 1-2 days, waiting for fertilization; Male sperm can maintain fertilization ability in female reproductive tract for 2-3 days, so it is easy to get pregnant during sexual intercourse within a few days before and after ovulation. To be on the safe side, we call the first 5 days and the last 4 days *** 10 days together with the ovulation date as the ovulation period. Because sexual intercourse during ovulation is easy to conceive, ovulation is also called susceptible pregnancy or dangerous period.

If your menstrual cycle is accurate, and it comes on the 4th, and the menstrual cycle is 30 days, for example, 1 day for this menstrual cramp is165438+14th of October, then the next menstrual cramp is 65438+4th of February, and then subtract/kl from 65438+4th of February. Ovulation date, the first 5 days and the last 4 days, that is, from 165438+ 10 month 15-24, is the ovulation period.

I hope my answer is helpful to you. Xi 'an Huadu Gynecology Hospital is located in Miao Street, the alley in the northwest corner of Xi 'an Annan Gate (next to Yongning Palace Hotel). If you need help, you can also consult and make an appointment on the website.