In early pregnancy if a pregnant woman has symptoms of preterm miscarriage or low progesterone, she can take progesterone, which has the effect of preserving the fetus. Most pregnant women do not have obvious reactions to progesterone, however, some pregnant women are sensitive to the drug and may experience slight dizziness, nausea and drowsiness after taking progesterone, which is related to the side effects of the drug, but will not affect the effect of fetal preservation, so it is generally recommended that progesterone can be taken about half an hour after a meal. If you are taking progesterone that you only need to take once a day, you can take it again before going to bed. In early pregnancy, patients who are on birth control have to take progesterone for birth control in addition to rest.