In every clinic, we meet many women with hyperthyroidism, and their biggest concern is about pregnancy and breastfeeding after delivery. In fact, many hyperthyroidism patients, who have not received proper guidance for a long time, are so afraid to get pregnant at a very old age, and even if they do get pregnant, they are worried about the impact on their children and spend their days in fear and anxiety, and even fail to breastfeed after giving birth, losing the most important joy of being a current mother and blaming themselves for not fulfilling their responsibilities as a mother. However, hyperthyroidism is not as scary as people think, and if you choose the right doctor, they will carefully and safely help women who want to get pregnant to handle it properly. First, the fact that a woman with hyperthyroidism can get pregnant confuses many patients and even doctors. Generally speaking, hyperthyroidism needs to be well controlled before pregnancy, and if the course of treatment reaches 1.5 to 2 years, you can try to stop the medication and consider pregnancy after stopping the medication. If you stop taking your medication for six months, it is likely that your hyperthyroidism will return and you will be unable to conceive at that time. The best way is to get pregnant with medication after the hyperthyroidism is under control, so that the thyroid function of the pregnant woman can be normal with a small dose of medication without affecting the baby. Of course, pregnancy with medication needs to be guided by a suitable doctor because it is important to control and adjust the dose of medication throughout the pregnancy. Secondly, those who are found to have hyperthyroidism after pregnancy do not need to perform abortion in a hurry. Clinical experience tells us that hyperthyroidism has a certain impact on the outcome of pregnancy, but as long as the hyperthyroidism is controlled in a timely and effective manner, most of them can deliver a normal child. However, this time of pregnancy, coupled with the severity of hyperthyroidism, the doctor’s observation of the condition and the selection and dosage adjustment of drugs is particularly critical. Thirdly, propylthiouracil (PTU) is the first choice of medication during pregnancy. If it is inappropriate, or not tolerated, methimazole (tadalafil) can also be used with caution, preferably at a dose of 150mg/day of PTU and less than 15mg/day of tadalafil. Maintenance at the lowest effective dose is required. Radioactive iodine treatment and glucocorticoids cannot be used during pregnancy, and the use of tacrine needs to be very cautious. Fourth, it is safer to breastfeed after delivery, preferably with PTU, and, it is safer to take the drug immediately after breastfeeding and then breastfeed a second time four hours later. Of course, attention should be paid to monitoring thyroid function in newborns whose mothers are taking the medication. Fifth, pregnant women with hyperthyroidism need to have their children’s thyroid function checked after delivery, and once the problem is found, it needs to be promptly handled by an endocrinologist. There is usually no effect on the child at this time. Finally, you need to see your doctor once every 1-2 weeks during pregnancy, and most patients need to have their thyroid function rechecked once a month.