Women should have leucorrhea every day, but the amount of leucorrhea is related to the menstrual cycle, which is generally the endometrial proliferation phase and the endometrial luteal phase, as well as the ovulation phase in between. In general, in the early menstrual period secretion is small, when the ovulation period secretion is more, thin watery leucorrhea, after ovulation luteal phase leucorrhea sticky, become less. The absence of leucorrhea is the girl before menstruation, or during the fertile period without menstruation, or three months without menstruation, or six months without menstruation, this time the leucorrhea will be less, belong to the endocrine abnormalities, need to further check the function of the ovaries to rule out the existence of premature ovarian failure. There is also a special case of postmenopausal women who basically have no secretion due to lack of estrogen and vaginal dryness.