Under normal circumstances, intercourse is possible after ovulation. If the patient undergoes embryo transfer after ovulation, it will take some time for the embryo to successfully implant, and it usually takes about 2 weeks to measure the blood or urine HCG level to determine the pregnancy, and ultrasonography is also needed 4-5 weeks after the transfer to determine whether it is an intrauterine pregnancy, and at this time, the doctor will instruct the patient not to recommend coitus. In addition, if the patient is about to undergo gynecological examination after ovulation, including vulvar examination, vaginal speculum examination, double diagnosis, triple diagnosis, anal diagnosis and abdominal examination, etc., coitus is also not recommended in this case. This is to prevent sperm from affecting the leukorrhea, vaginal environment, cervical condition, etc., which may lead to inaccurate test results. After the egg is discharged from the ovary, the survival time is about 24h, and the sperm usually survive in the female reproductive tract for 48-72h, so if the above conditions do not exist, you can have intercourse at this time to facilitate conception. In addition, it is necessary to take reasonable nutritional supplements, especially protein, minerals and vitamins to help improve the chances of conception and ensure the healthy development of the fetus. Before conception, all adverse factors should be avoided, such as avoiding exposure to tobacco and alcohol, avoiding physical and chemical stimuli, and preventing infection by disease-causing microorganisms, in order to avoid lowering the quality of sperm and eggs, affecting the development of fertilized eggs and embryos, and interfering with the normal course of the pregnancy and the healthy development of the fetus. If for some reason the doctor has instructed the patient not to have intercourse after ovulation, at this time you should follow the doctor’s advice and trust the doctor to avoid unnecessary accidents.