Whether progesterone 12.18ng/ml is normal or not needs to be assessed on a case-by-case basis, and a distinction needs to be made between results during pregnancy or non-pregnancy, as well as differences at different times during non-pregnancy. The value of progesterone varies at different stages of menstruation, and also in the follicular and luteal phases for non-pregnant women of normal childbearing age. 1.Non-pregnant: (1) Follicular phase: for the early and middle follicular phase, the value of progesterone is generally less than 1ng/ml, and in the late follicular phase, the value of progesterone is generally between 1-3ng/ml. if the value of progesterone is 12.18ng/ml in this period, it is abnormal, and it is considered that there is atrophy of the luteal body. (2) Luteal phase: Progesterone value in the luteal phase can reach more than 10ng/ml, and 12.18ng/ml in this period is normal. (2) Pregnancy: In pregnancy, the general level of progesterone is more than 20ng/ml, and the level of more than 25ng/ml is relatively safe. Therefore, the progesterone value of 12.18ng/ml in this period is abnormal, and it is necessary to further exclude preeclampsia, ectopic pregnancy and so on. To summarize, if progesterone 12.18ng/ml occurs, it is recommended to promptly inform the doctor of the last menstrual period, menstrual cycle, sexual life and other circumstances, and promptly improve the blood or urine HCG to rule out the existence of pregnancy. Under the guidance of the doctor to improve the examination.