Ovarian cancer is known as the "silent killer" because women often experience no symptoms until the disease has progressed to an advanced stage.
The study, by the National Institute of Environmental Sciences is the first to link the ovarian cancer to the procedure - which is reportedly practiced by millions of women.
Some women practice private part washing, because they think it would make them cleaner. But, what they didn't know that this can cause some serious and dangerous health problems.
Most doctors would recommend against the practice of squirting water, or fluids into the vagina because it changes the natural balance of healthy bacteria and can make it easier to pick up infections.
One survey discovered that 29% of 232 people actually admitted that they are regularly washed and 57% admitted that they never did it.
Based on this research it was discovered that flushing can be related to pelvic inflammatory disease, cervical cancer, fungal infections and reduced fertility.
Experts link this so called vagina self cleaning with many other health diseases like reduced fertility, yeast infections, pelic inflammatory disease, different kind of infections etc.
Joelle Brown is epidemiology professor at the University of California, San Francisco, and she was not involved in the study, but she said that link between douching and ovarian cancer took her by surprise.
Even though, almost all of the gynecologist and doctors do not recommend douching as a method of cleaning the vagina, some women continue to do it, watching only the positive side of it, that is better hygiene.