Yuketin is known as levonorgestrel tablets. Taking levonorgestrel tablets once in a while has an effect on breastfeeding because the main ingredient of levonorgestrel tablets is progesterone and it can be absorbed by the baby through breast milk. Progesterone has an effect on the growth and development of the baby, and a three-day interval is needed between taking levonorgestrel tablets before breastfeeding, during which time the milk should be expressed regularly. Although levonorgestrel tablets for no measures of sexual life or measures of sexual life failed, can achieve the purpose of contraceptive remedy. However, because the dose is relatively high, there will be some side effects. Not only will there be nausea, vomiting phenomenon, and may cause the mother’s menstrual disorders, it is recommended to try to take regular contraceptive methods. If you have already given birth to a baby, you can choose to place an IUD or a condom under the guidance of your doctor, depending on your situation. In addition, during breastfeeding, it is safer to take any medication as prescribed by the doctor, so as not to affect the development of the baby.