The examination time for menstrual disorders should be chosen according to the patient’s condition and the examination items: 1. Sex hormone six: people with normal menstrual cycles can choose to have their blood drawn on the second, third, fourth, or fifth day of menstruation; patients with scanty menstruation, such as those who do not have menstruation for three months, five months, or even half a year can have their blood drawn anytime; and patients with abnormal uterine bleeding, such as those who have a period that lasts for 20 days, 30 days, or even 40 days can have their blood drawn at any time; 2. Thyroid function and insulin resistance: the blood is usually drawn in the morning on an empty stomach.