Free estriol values vary according to menstrual cycle and whether or not a woman is pregnant, and are <7nmol/L in adult women, so 0.62nmol/L in non-pregnant adult women is generally normal. If you are pregnant, 0.62nmol/L is abnormal. Free estriol is a type of estrogen, and in non-pregnancy, the level of free estriol in the body is very low, usually <7 nmol/L. During pregnancy, the placenta produces a large amount of estriol, and the level of estriol increases as the pregnancy progresses. The normal value of free estriol at 24-28 weeks of pregnancy is 104-594nmol/L; the normal value of free estriol at 29-32 weeks of pregnancy is 139-763nmol/L; the normal value of free estriol at 33-36 weeks of pregnancy is 208-972nmol/L; and the normal value of free estriol at 37-40 weeks of pregnancy is 278-1215nmol/L. Free estriol 0.62nmol / L, should carry the report card in time to see a doctor, the physician combined with the clinical synthesis of judgment, if necessary, in accordance with medical advice standardized treatment.