Have you used talc-based powders?
Talc was largely marketed to women as a method of staying comfortable and free of vaginal odors, and women routinely would dust talc on their underwear, genital area, and sanitary napkins. In the early 1970s, scientists suggested a link between the intimate use of talcum powder and ovarian cancer, claiming talc particles traveled into the ovaries from the vagina. More recent research has shown that women who used talc-based powder for intimate personal hygiene were at a 30% increased risk of developing ovarian cancer. The International Agency for Research on Cancer (IARC) has classified the use of talc-based powders near the genital area as “possibly carcinogenic to humans.”