The increase of estrogen in the body after pregnancy increases the cervical and vaginal secretions, so it appears clinically as an increase of leucorrhea. However, the nature of the leukorrhea does not change, it is still milky white with no odor, or only a faint fishy smell, but the amount tends to increase. If the leukorrhea changes in a transparent way, it is most often the leukorrhea that is characteristic of ovulation, when sperm pass through the cervix more smoothly. Therefore, the hormone level in the body changes, causing the local mucus of the cervix to become diluted, making the vaginal discharge become as clear as egg white, and the degree of lacrimation is particularly good, which is the leucorrhea unique to ovulation and often occurs clinically in the middle of menstruation.