Generally, when ovulation occurs, the leukorrhea will increase, and may be thin and transparent mucus, which varies from person to person. Under the influence of sex hormones secreted by the ovaries, the mucus secreted by the cervical gland cells will also be affected and undergo cyclic changes. During ovulation, due to the rise in estrogen levels, the cervical gland cells increase their secretion function, which is manifested by an increase in the amount of leukorrhea, which is thin and transparent and has a high degree of starch. After ovulation, estrogen level decreases and progesterone level increases, which makes the cervical mucus secretion gradually decrease, and the character will also change, become viscous and turbid and poor drawing degree, easy to break, clinically through the observation of cervical mucus changes can also determine the ovulation period, but due to the individual differences, need to be judged by professionals, so the available ovulation test paper detection.