Ovary Keychain by I Heart Guts Fall head ova heels in love with this ovary keychain! Engraved back of keychain and display read: "Ovary: Ova Achiever" Ovarian facts grace the back of our cardboard display. Zinc alloy with soft enamel, ovary measures 2" x 1.73". I Heart Guts puts a smile on your face and smarts in your brain.