Leucorrhoea during ovulation is a common physiological phenomenon that usually occurs between the 14th and 19th days of a woman's menstrual cycle. At this time, women's vaginal secretions will increase, become thin in texture, transparent in color, and appear to be in a mucus-like or watery state. This phenomenon is called "ovulation discharge."

1. Changes in hormonal levels in women: In the middle of the menstrual cycle, women's hormonal levels will change, leading to an increase in vaginal discharge.

2. Uterine contractions: During ovulation, a woman’s uterus contracts, which may lead to increased vaginal discharge.

3. Natural cleaning effect of the female reproductive tract: During the ovulation period, women’s vaginal secretions can help remove dirt and bacteria in the reproductive tract, thereby keeping the reproductive tract clean and healthy.

4. Attract men: During ovulation, women may have an increase in vaginal discharge, which may attract men into the reproductive tract, thereby increasing the chance of sexual contact.

Although secretions may increase during ovulation, this does not mean that it is a normal physiological phenomenon. If you feel unwell or have any concerns, it is recommended to consult a doctor or professional healthcare provider.