Oral progesterone supplementation during pregnancy is generally based on two reasons, for different reasons, oral progesterone time is different, the most common is a small amount of bleeding during pregnancy or progesterone levels are relatively low, there is a pre-eclampsia, in this case progesterone to eat to 14 weeks of pregnancy can be, because after 14 weeks of pregnancy after the placenta is formed, placental secretion of hormones can be used to support pregnancy instead of progesterone to meet the The hormone secreted by the placenta can replace progesterone to support the pregnancy and fulfill the needs during pregnancy, so you can stop taking the medicine at 14 weeks. There are also cases of spontaneous abortion, embryo stops developing or inevitable miscarriage, if these cases are more than 2 times, you need to take oral progesterone in your next pregnancy, usually take it until 25-26 weeks of pregnancy, or push back the gestational week when the embryo stops developing in your last pregnancy by 2 weeks to stop taking the medicine.