When the leucorrhea appears the day after intercourse, it is mainly because ovulation has already occurred that the leucorrhea is unique to the ovulation period. During ovulation, the hormonal changes in the body lead to changes in the local secretions of the cervix, which become thin and favorable for sperm penetration. The secretion is often egg-white like and has a particularly good laxity, which is characteristic of leukorrhea during ovulation. If you have intercourse before ovulation, it is clinically possible that it may lead to pregnancy. Therefore, if you are planning to get pregnant, it is recommended to improve nutrition and to keep your vulva clean to avoid pathogenic infections that can cause inflammation of the reproductive tract. If you are not planning to get pregnant, it is advisable to take the oral emergency contraceptive pill within 72 hours after intercourse to achieve the effect of contraception.