What is the normal value of progesterone?

Progesterone is a very important hormone in women of reproductive age, also known as progestogen or luteal hormone. It plays a key role in maintaining normal menstrual cycles, supporting pregnancy, and promoting fetal growth and development. So what level of progesterone is considered normal?

What Is the Normal Range for Progesterone?

During pregnancy, progesterone levels gradually rise with advancing gestational age. Generally, around week 7 of pregnancy, the body's progesterone level is approximately 76.4–23.6 nmol/L; between weeks 17 and 20, progesterone levels are about 197.5–43.6 nmol/L; and from weeks 37 to 42, progesterone levels range from 206.6 to 728.3 nmol/L.

A sudden increase in progesterone is most likely due to pregnancy. Since progesterone helps the fertilized egg survive the critical early developmental stage, progesterone levels in the body rise sharply after conception. It is recommended to perform an hCG test to confirm whether pregnancy has occurred. Ovarian function issues: chronically elevated progesterone levels may indicate underlying ovarian dysfunction. Conditions such as ovarian tumors or inflammation can lead to abnormal increases in progesterone. An ultrasound examination is advised to evaluate ovarian health and allow timely treatment of any primary disease, which can help normalize progesterone levels.

Pregnant women should ensure adequate rest during pregnancy, avoid sexual intercourse, and take folic acid supplements to prevent neural tube defects. Attention should also be paid to diet—consuming nutrient-rich foods that help replenish energy and blood, such as red meat, chicken soup, and shrimp. We hope this information is helpful to you. Wishing you good health and happiness!