Ovulation transparent jelly-like discharge may be ovulation, under the influence of ovarian sex hormones cervical gland cells secretion of mucus, physical and chemical properties and secretion of the amount of obvious cyclical changes. After menstruation, estrogen levels decrease and the cervical canal secretes very little mucus. With the rising estrogen level, the amount of mucus secretion increases during ovulation, and the mucus becomes thin, transparent, and filamentous, with a filamentous degree of up to ten centimeters or more. If the mucus for smear examination, after drying can be seen amniotic plant-like crystals, this crystallization to the ovulation period is the most clear and typical. After ovulation by the influence of progesterone mucus secretion gradually reduced, the texture becomes viscous, the drawing degree is poor, easy to break, then do a smear examination can be found that the crystals gradually become fuzzy, so clinically based on the cervical mucus examination can understand the ovarian function.