Ovulation lassitude discharge usually lasts for 2 to 3 days. After the menstrual period is clean, with the increase of estrogen in the body, the secretion gradually increases and the mucus becomes thin and transparent. By the time of ovulation the discharge can be more than 10cm. After ovulation, with the influence of progesterone, the mucus secretion gradually decreases, and the drawing degree is poor and easy to break. The filamentous discharge lasts for about 2 to 3 days. Changes in vaginal secretions favor fertility. During ovulation, the filamentous secretion increases, which is most suitable for sperm to pass through. After ovulation, vaginal secretions gradually become viscous, which is also a protective effect on the vaginal environment and prevents the attack of external germs if pregnancy occurs.