The ideal value of progesterone in the 5th week of pregnancy is 20ng/ml or more. If it is less than 20ng/ml, the pregnant woman may suffer from pre-eclampsia or miscarriage. Pregnant women should have enough progesterone to be able to keep the fetus stable and beneficial to the development of the fetus. Low progesterone can pay more attention to the diet, eat more soy products, timely supplement the body nutrition, eat more fresh fruits. You should take appropriate exercise, do not sit or lie down for a long time, pay attention to more rest and avoid overexertion. If you have low progesterone but no bleeding and stomach pain, you can not supplement progesterone and check progesterone first. If there is bleeding or stomach pain, you can supplement progesterone. If progesterone is persistently low, you need to go to the hospital for pregnancy checkups in time to prevent serious problems and carry out the appropriate treatment under the guidance of the doctor.