Frequent intercourse has an effect on pregnancy. Frequent intercourse can lead to poor semen quality and low sperm count, and frequent intercourse can also lead to women being prone to vaginitis, cervicitis, and even pelvic inflammatory disease. Generally, sex is best twice a week. If you have the requirement to have children, you can have intercourse during ovulation, use ovulation test paper to detect which day you ovulate, or measure your basal body temperature and have intercourse when your basal body temperature rises after forming a curve, or you can have intercourse at the hospital after the follicles have matured for ovulation monitoring. This type of intercourse is usually done once before ovulation, then every other day, and then again after ovulation.