A vaginal discharge is common for most women. Discharge may be more noticeable during the middle of the menstrual cycle (ovulation). Some women even find it necessary to wear a pad or panty liner because of the amount of discharge.
Normal vaginal discharge:
A change in your normal vaginal discharge may be a symptom of a vaginal infection.
Teenage girls may have a large amount of a watery discharge caused by high hormone levels during the teen years or by taking birth control pills.
WebMD Medical Reference from Healthwise