When taking progestin, it can produce dizziness, headache, nausea, depression, and breast tenderness because after oral administration, it can produce stimulation of gastrointestinal function and some women will experience weight loss. If there is no nausea or vomiting, progesterone can also cause edema throughout the body, resulting in weight gain. Oral progestin can also cause side effects, such as breakthrough bleeding or spotting of vaginal bleeding, and the dose of oral progestin can be increased moderately to stop the bleeding. Also, after taking oral progestin, the nature of the cervical discharge will change to a certain extent, and a milky or yellow sticky discharge will appear. It is important to pay attention to the hygiene of the vulva to avoid the chance of cross-infection. It can also cause constipation, which is an important side effect, so it is important to eat more fruits and vegetables to avoid severe constipation.