Estradiol 148pmol/L on the third day of menstruation mostly belongs to normal physiological phenomenon, a small portion of it may be related to pathological phenomena such as systemic lupus erythematosus and ovarian malignant tumors, which need to be analyzed specifically. Estradiol is a kind of estrogen, which is secreted by the ovary and will change with the menstrual cycle. The third day of menstruation belongs to the luteal phase, and estradiol 148 pmol/L belongs to the normal physiological phenomenon. Estradiol 148 pmol/L is a normal physiological phenomenon. If the patient has systemic lupus erythematosus, heart disease, or suffers from organic lesions of the ovaries, such as malignant tumors of the ovaries, the estradiol in the body will also be elevated. Estradiol 148pmol/L on the third day of menstruation is also related to other reasons. If you suspect that you have hormonal abnormalities, it is recommended that you consult a doctor in a timely manner to clarify the cause of the disease and then treat the symptoms to avoid delaying the disease.