Currently, there are more inquiries about this issue, especially after the full second child, and there are often inquiries from patients who need to take eugenol for a long time or for life because of Hashimoto’s thyroiditis, post-operative thyroid cancer, or nodular goiter. The thyroxine contained in Eugenol is originally a hormone produced by the human body, and thyroxine can only rarely pass through the placenta, so it has no direct effect on the fetus. Otherwise, stopping the medication will bring certain dangers, such as miscarriage, fetal neurological dysplasia, etc. After the baby is born, the mother should not stop breastfeeding the baby because she is taking Eugenol. As long as the thyroid function is maintained at normal level, it is possible to breastfeed on Eugenol and there is no adverse effect on the baby. Therefore, it is safe to say that you can take Eugenol for pregnancy and breastfeeding. As long as you have regular blood tests to adjust the dosage of the medication and communicate with your doctor, you can be pregnant, have a baby and breastfeed.