Intercourse during ovulation can be effective in increasing the chances of natural conception. The most accurate method to monitor ovulation is ultrasound monitoring combined with blood hormone measurements. There are of course some simple ways to predict ovulation, including observing the condition of the leukorrhea, changes in libido or mood, and the condition of lower abdominal pain. Some simple tools can be used, including basal body temperature measurement, monitoring urine LH and other methods. For example, about five to six days before ovulation, the amount of cervical mucus will increase due to the rising concentration of estrogen in women’s bodies, until the peak of mucus volume within two to three days before ovulation, after which intercourse is the most fertile. When the mucus is very sticky, the conception rate is low, while when the mucus is abundant, clear and slippery, it is also the most fertile time. However, the curve of the basal body temperature may not be very clear. Sometimes, when you look back at the temperature chart in the next cycle, you can find the ovulation point. For couples who rarely have intercourse, using urine LH test strips is also an effective way to achieve the best chance of conception. About 1/3 of women have ovulation pain, which occurs in the lower abdomen on the side of ovulation and is intense or persistent and dull and can last about 6-12 hours. This is called ovulation pain. During ovulation, due to the increase in prostaglandins in the body, the pressure in the follicular fluid cavity increases and the ovarian surface has to rupture to expel the egg, a process that produces lower abdominal pain in some sensitive women. The day of the ovulation pain, intercourse can improve the chances of conception. 2, the way of intercourse Many past studies have shown that since sperm can enter the cervix soon after intercourse, or even enter the uterus quickly and enter the abdominal cavity through the fallopian tubes, it is not necessary to lie flat for a long time after intercourse. The position of intercourse is also unlikely to affect the chances of conception. However, some couples use vaginal lubricants during intercourse. Some studies have shown that many vaginal lubricants may inhibit the motility of sperm, so vaginal lubricants should be avoided as much as possible.