Vaginal discharge serves an important housekeeping function in the female reproductive system. Fluid made by glands inside the vagina and cervix carries away dead cells and bacteria. This keeps the vagina clean and helps prevent infection. Most of the time, vaginal discharge is perfectly normal. The amount can vary, as can odor and color which can range from clear to a milky white-ishdepending on the time in your menstrual cycle. For example, there will be more discharge when you're ovulatingbreastfeedingor sexually aroused. None of those changes is cause for alarm.