Back in the day, people with vaginas stuffed all sorts of stuff inside themselves—from crocodile dung to lint and honey—in an attempt to prevent pregnancy.

Fortunately, we have progressed from the days of crocodile dung contraceptives, and these days, vagina owners looking for physical forms of birth control have more advanced options.

Along with barrier options, such as diaphragm caps, vaginal contraceptive films (sometimes abbreviated VCF) are, well, exactly what they sound like: squares of thin spermicide-coated film that fit into the vagina, where they dissolve to extinguish any invading sperm that enter during intercourse.

Contraceptive films have some major pluses on their side, like the fact they're affordable, easy-to-use and can be purchased over the counter without a prescription. But are they safe? And equally important: Do they work?

Here's what James Gohar, M.D., an OB-GYN and founder and CEO of Viva Eve in New York City, had to say about the safety and