Low progesterone may also occur in a new pregnancy, which is mainly related to endocrine disorders, insufficient corpus luteum function and poor development of the embryo itself. 1. Endocrine disorders: Pregnant women who often stay up late at night, are overly tired or excessively thin may experience endocrine disorders, resulting in low progesterone. 2. Luteal insufficiency: within 6 weeks of pregnancy, progesterone mainly comes from the corpus luteum of the ovary, so low progesterone in early pregnancy may be caused by luteal insufficiency. This situation is likely to cause the embryo to stop developing, need to supplement progesterone or dydrogesterone to maintain the normal development of the embryo. 3. Poor development of the embryo itself: If the embryo itself is not well developed, low progesterone levels in early pregnancy may also occur. This situation may lead to spontaneous abortion. After pregnancy, women should pay attention to rest, adjust the diet structure, and should have regular pregnancy checkups to detect the development of the fetus and the health of the mother.