Letrozole tablets for 5 days generally follicles should grow how big is no fixed data, and not eat letrozole tablets will necessarily promote follicle growth, the main is still based on the results of the examination. Letrozole tablets are anticancer inhibitors and third-generation aromatase. It is mainly used for the treatment of breast cancer and other diseases. Letrozole tablets also have the effect of promoting ovulation. By inhibiting estrogen synthesis, it can lead to positive feedback in the hypothalamus and pituitary gland, increase the release of human chorionic gonadotropin in the body, and achieve the effect of inducing ovulation. Common adverse reactions to Letrozole Tablets include hot flashes, arthralgia, nausea, and fatigue. Patients who are allergic to Letrozole Tablets and premenopausal, pregnant and lactating women should be prohibited from taking it. Patients are advised to go to a regular hospital for examination and then proceed to the next step of the program under the guidance of the doctor.