In ectopic pregnancies, progesterone is not very different from normal pregnancies, which are normally above 25ng/mL. However, with the development of the fertilized egg, many ectopic pregnancies will result in miscarriage and progesterone will drop significantly and will be relatively lower than 25ng/mL, related to embryonic activity, somewhat likely around 5-15ng/mL. When you are pregnant, if you have high risk factors for ectopic pregnancy, you should seek timely examination to avoid rupture of the ectopic pregnancy or miscarriage before emergency hospitalization. Meanwhile, to determine ectopic pregnancy, it is mainly determined by ultrasound. If early ultrasound cannot detect it, you can also make a preliminary judgment by HCG value. The HCG value for ectopic pregnancy is slightly low and will rise slowly. In a normal pregnancy, the HCG value will rise exponentially every two days, but in an ectopic pregnancy, it usually does not, and it will fall, so you can also make a preliminary diagnosis and then review the ultrasound for further clarification.