There is no need to take progesterone when there are no symptoms in the first trimester of pregnancy, and if there are symptoms of pre-eclampsia, you can continue to take progesterone orally under the guidance of your doctor. Adequate progesterone levels in early pregnancy are conducive to embryo implantation and continuation of pregnancy, when the general condition of the first trimester of pregnancy is stable and the ultrasound examination of the embryo is well developed do not need to take progesterone, when there is abdominal pain, vaginal bleeding and other symptoms of preeclampsia, when necessary, can be given by the doctor’s instructions to preservation of the fetus, such as progesterone treatment, and on time to re-examination. Before taking progesterone to exclude allergies, vascular embolism and other contraindications, after taking the drug may appear dizziness, headache and other adverse reactions. After taking the medication, if the symptoms are relieved or disappear, and the ultrasound suggests that the embryo is well developed, the pregnancy can continue; if the symptoms worsen, it may develop into an inevitable miscarriage, and it is necessary to terminate the pregnancy in a timely manner.