The incidence of infertility is increasing every year, and outpatients often ask how to calculate ovulation and the timing and frequency of intercourse. Accurate determination of a woman’s ovulation period can increase the rate of conception, either by analysis with a basal body temperature chart, or by using a pregnancy test for intercourse at the time of ovulation. Usually having sex every other day around the time the woman ovulates will ensure the greatest chance of sperm-egg union. It is best not to use lubricants during intercourse, but if you must, it is recommended to use safer vegetable oils, olive oil or oil-gel type lubricants. Men who have problems with erectile function can consider applying Viagra, cialis, etc. These drugs have no significant adverse effects on fertility. Adjustment of unreasonable sexual habits can also be more successful in grasping the chances of fertility, such as adjusting the sexual position so that the ejaculated semen is not easily “lost” and stays in the female reproductive tract for a longer period of time; women can also lie on their backs and raise their hips for more time (about 30 minutes) after sex, so that the semen can have sufficient For women with a retroverted uterus, turning the body over and lying prone with the hips elevated is also conducive to conception. The frequency of sexual intercourse also has a relationship with fertility. Frequent sexual intercourse will make the number of sperm too small, and sperm are mostly in a childish state, coupled with frequent sexual intercourse triggered by long-term congestion of the accessory gonads, glandular secretion dysfunction, affecting the composition of semen, which is also unfavorable to fertility; conversely, too little sexual intercourse, although the number of sperm may be relatively more, but due to the sperm in the body for too long, resulting in aging, coupled with abstinence triggered by the increase in semen volume and changes in semen composition, are not conducive to sperm function. Both are detrimental to sperm function. In order to achieve the purpose of fertility, the ideal number of sexual intercourse varies from person to person, even the same body is affected by many factors, it is generally believed that the newlywed period to 3 to 4 times a week is more appropriate.