Daflon is also known as dydrogesterone tablets, in vitro fertilization of the fetus at 9 weeks generally need to continue to take dydrogesterone tablets, at least until after 10 weeks of pregnancy after the effect of its preservation of the fetus is better. Women need to take dydrogesterone tablets to replenish progesterone after in vitro fertilization, at least until 10 weeks after the pregnancy its better to protect the fetus, 9 weeks of the fetus do not stop taking the drug, stopping the drug too early may not play the role of the fetal effect, increase the chances of miscarriage of the fetus. Deferiprone tablets are contraindicated in patients with known hypersensitivity to the active ingredient or any excipients of the product, known or suspected progesterone-dependent tumors, unexplained vaginal bleeding, and severe hepatic or renal dysfunction. Breakthrough bleeding may occur in some patients with the use of dydrogesterone tablets, which may be prevented by increasing the dose. There may also be adverse reactions such as changes in menstrual blood flow, amenorrhea, vomiting, abdominal pain, changes in liver function, jaundice, breast pain, itching, skin irritation, and urticaria. Due to individual differences, each woman who takes Deferiprone tablets for fertility preservation after IVF transplantation will be different, depending on the individual’s physical condition, it is recommended to go to the hospital and let the doctor decide the time to stop taking the medicine according to the individual’s condition.