For women with regular menstrual cycles, ovulation usually occurs about 14 days before the next menstrual period, on the day of ovulation, plus 5 days before and 4 days after, a 10-day period known as the fertile period. For women with irregular menstrual periods, there is no way to calculate the specific date of ovulation, you can use ovulation test paper to detect it. The two red lines are as deep as each other on ovulation test paper, which means a strong positive result, indicating that ovulation can occur within 24 hours, and the chances of conception are high. In addition, conception is a very complex physiological process that requires normal eggs from the ovaries, normal semen containing normal sperm, and the formation of a fertilized egg in the fallopian tube, none of which is possible. If you have not been pregnant and there is no disease on both sides of the couple, consider that it has something to do with the inappropriate time of conception. You must pay attention to the number of times you have intercourse, if too often will also affect the quality of sperm, non-ovulatory twice a week can be, ovulation every two days intercourse, women also need to exercise more during ovulation to promote follicle discharge to increase the chances of conception.