Vaginal discharge refers to the fluid that is produced by the vagina and expelled through the vulva. It is a normal physiological process, which helps to cleanse and maintain the health of the vagina. The composition of vaginal discharge varies throughout the menstrual cycle, being more abundant during ovulation. In most cases, it has no odor or color, but sometimes it may have an unpleasant smell due to bacterial infection or other factors such as stress, hormonal changes, or certain medications. Vaginal discharge is usually not a cause for concern unless there are accompanying symptoms like itching, burning, redness, or abnormal odor.