LH is also known as luteinizing hormone. Low LH may delay follicular development or failure to ovulate, which may have an effect on normal ovulation. LH is secreted by basophils in the anterior lobe of the pituitary gland, and its main function is to promote the final maturation of the follicle and ovulation. Low LH may affect the maturation of the follicle and ovulation. Before ovulation, the pituitary gland secretes increased LH secretion, forming LH peaks to promote follicular ovulation. After the follicle forms the corpus luteum, which secretes progesterone, and a certain level of LH can maintain the corpus luteum function. If LH is low, it will not only affect ovulation but may also cause luteal insufficiency. If women have low LH, they should consult the doctor in time and regulate it as early as possible so as not to cause infertility and other adverse effects.