Ovulation is usually observed about 1-3 days after the appearance of stretched leukorrhea, which is a sign of pre-ovulation. However, due to individual differences, the time may also vary. Women in the ovulation leukorrhea was egg white, more, thin, transparent, pulling the degree of up to 10cm, at this time generally about 1-3 days will occur ovulation, ovulation will occur after the body will undergo a series of changes, with the gradual increase in progesterone levels, leukorrhea may become viscous by the nature of the pulling thick, so in the leukorrhea phenomenon of pulling thick, indicating that there is already a progesterone elevation, that is, there is already an ovulation. The exact time for ovulation to occur when the leukorrhea becomes stringy varies from woman to woman, and may take 1~3 days for some and 4~5 days for others. Moreover, the process of the leukorrhea changing from a thread-like to a thicker state is slow and does not occur suddenly. It is not very accurate to judge ovulation based on leukorrhea, if you want to accurately monitor ovulation, you can perform a gynecological ultrasound.