In general, if ovulation is successful after taking Letrozole tablets, the best time to conceive is usually 3-7 days. Letrozole tablets are ovulation-promoting drugs and are usually taken from the 5th day of menstruation for 5 consecutive days. In most cases, ovulation will occur 3-7 days after stopping the drug, so it is recommended to have sexual intercourse during this period for the best time to conceive. If the patient has polycystic ovary syndrome or other diseases that affect ovulation, generally speaking, ovulation will not occur on its own after taking Letrozole tablets, and HCG injection may be needed to promote ovulation and treat the original disease at the same time. Therefore, the best time to conceive after taking Letrozole tablets should be analyzed according to the patient’s specific condition. In addition, ovulation can be monitored under ultrasound after taking Letrozole Tablets. It is easier to get pregnant after the follicles are found to have ruptured.