Angiostatin should refer to progesterone softgels, and there would be no need to use progesterone softgels for labor preservation in the late stages of pregnancy. If there are symptoms of preterm labor, it may be necessary to apply magnesium sulfate or ritodrine hydrochloride and other drugs to protect the fetus. Progesterone is a natural progesterone that can be used to regulate menstruation, and can also be used to preserve the fetus when there is preterm labor in early pregnancy. Progesterone can also be used when there are symptoms of menstrual cramps, which can be relieved. In late pregnancy if there are symptoms of premature labor, do not blindly take progesterone, although this time to use progesterone on the fetus is not much effect, but the role of birth control is not very good. If you have symptoms of preterm labor, you can use fetal preservation drugs under the guidance of your doctor, such as magnesium sulfate or ritodrine hydrochloride can be injected intravenously to inhibit uterine contractions, so as to achieve the purpose of fetal preservation. During the period of fetal preservation, absolute bed rest, pay attention to keep bowel movement. In addition, the use of specific drugs during pregnancy should be under the guidance of a doctor, do not take on your own.