Prolactin is also called prolactin, and its normal value range is related to age, gender, and different physiological periods. Normal values of prolactin range from <23μg/L in the follicular phase in women; 5.0~40.0μg/L in the luteal phase in women; 80μg/L in the first trimester of pregnancy; 160μg/L in the middle trimester of pregnancy; 400μg/L in the second trimester of pregnancy; and 20μg/L in men. Prolactin is one of the hormones secreted by the pituitary gland area of the brain, and the level of prolactin increases significantly in women during the late stages of pregnancy as well as during breastfeeding, thus prompting lactation to occur in the female breast. When prolactin is too high, a woman’s reproductive function may be significantly affected, leading to decreased menstruation or even amenorrhea. It is recommended that women with abnormal prolactin values go to the hospital in time to have the cause clarified under the guidance of the doctor and undergo targeted treatment to avoid delaying their condition.