You must note here that clear watery discharge before a missed period can be a symptom of ectopic pregnancy or even first stage vaginal cancer too. (checkpregnancy.com)
Vaginal cancer occurs when cells in the tissue of the vagina grow out of control and form malignant tumors. (bidmc.org)
The U.S. Food and Drug Administration (FDA) later withdraws DES approval after it is connected to vaginal cancer in young - adult daughters who were exposed to it in the womb. (endocrinescience.org)