A woman has only one ovum in a month, and there are 8 days of ovulation, that is, 4 days before and 3 days after the day of ovulation are considered as the period of ovulation. Clinically, if you are planning to get pregnant, having intercourse at the time of ovulation will improve your chances of getting pregnant. To calculate the ovulation period, we need to calculate the day of ovulation first, if the menstrual cycle is 30 days, in the clinical and regular situation, the day of ovulation is often in the first 14 days of menstruation, so according to the day of ovulation can be deduced the ovulation period. During ovulation, there will be a discharge like egg white, relatively large amount, and the pulling degree is particularly good. The main reason is that under the action of hormone level, the cervical secretion becomes relatively thin, which is favorable to the sperm to pass through. So correctly grasp the time of ovulation, the correct coitus will improve the chances of pregnancy.