The entire period of ovulation lasts about 10 days, usually about 14 days before the next period, which is the day of ovulation, and a period of five days before and four days after the day of ovulation, which is the period of ovulation. Ovulation can occur at any time during this period, not necessarily on the day of ovulation. Ovulation is affected by many factors and may occur early or late. If you are planning to get pregnant, you can use ovulation test strips to monitor ovulation, or you can have an ultrasound to monitor your follicles so that if you have intercourse when the follicles are mature, you will have a better chance of getting pregnant. If you intend to use safe period contraception, it is best not to use this form of contraception, safe period contraception is the most unsafe, there is a possibility of unwanted pregnancy. During the ovulation period, many women will have obvious symptoms, such as there may be an increase in leukorrhea, thinning in the form of pulling silk, may also have abdominal cramps, lumbar acidity, back pain and other symptoms.