The pituitary prolactin in women’s blood varies from time to time, and the normal value of pituitary prolactin is usually less than 1.14 mmol/L when there is no pregnancy. This is because pituitary prolactin secretion is usually low when there is no pregnancy, and if pituitary prolactin secretion is high, it will affect the endocrine function of the ovaries and may often cause amenorrhea, so there is a disease called hyperprolactinemia. The reason for this is that there is a disease called hyperprolactinemia, also known as lactational amenorrhea syndrome, which is caused by excessive secretion of prolactin by the pituitary gland, resulting in amenorrhea in women. The pituitary gland’s secretion of prolactin may also be affected by staying up late or by moods and emotions, so you need to get enough sleep and sit still for more than half an hour before having your prolactin checked, so that the test results are more accurate. The normal value of pituitary lactogen is less than 7.28 mmol/L in the middle of pregnancy, while in the late pregnancy, pituitary lactogen increases significantly, often less than 18.20 mmol/L. Just During pregnancy, pituitary prolactin itself increases physiologically, so there is usually no need to specifically test for prolactin at this time.