Generally ovulation is about 10 days, ovulation is about 10 days, in the egg row in the fallopian tube 1~2 days easy to get pregnant. Want to calculate the ovulation period, first of all, to clarify the ovulation day most regular women, in the next time to menstruation before about 14 days is the day of ovulation, but some women are not sure of the day of ovulation, may be two days in advance or delayed for two days, and even some women menstrual cycle long or short. So generally ovulation is about 14 days before the onset of menstruation counting five days forward and four days backward, the day of ovulation is about 10 days. After the egg is discharged from the ovary, it will wait for fertilization in the fallopian tube and can survive for 1~2 days, while the sperm can survive for 2~3 days in the female reproductive tract, so the chances of getting pregnant are higher if you have intercourse on the day of ovulation, that is, 14 days before the next menstrual period. If you want to prepare for pregnancy, you can use ovulation test paper to detect ovulation and have intercourse on the day of ovulation. Women’s ovulation is affected by many factors and may be advanced or delayed. If you don’t want to get pregnant, it is not recommended to use ovulation counting as a contraceptive, and you should take proper contraceptive measures to prevent unwanted pregnancy.