The main medications currently used to protect the fetus are progesterone capsules, kidney fixation pills and pregnancy health oral liquid. The best way to preserve the fetus is to take absolute bed rest, minimize activities and avoid staying up late and straining. The embryo development is also superior, good seeds will germinate sooner or later, bad seeds birth control may not necessarily be successful, most of them may fail to keep the baby. Early pregnancy check progesterone value is low, try to timely supplement progesterone, low progesterone leads to preterm abortion timely birth control, pay attention to rest may be successful in birth control. In early pregnancy, do not eat spicy, cold, stimulating food, try to eat a light diet, you can rest at home in bed, oral treatment of fetal preservation drugs, you can also be hospitalized progesterone injection to preserve the fetus.