The function of the oviducts in female frogs is to connect the uteri to the ovaries. When eggs are released from the ovaries of the female, the oviducts release a protective fluid that covers the eggs.
Oviducts in male frogs are referred to as vestigial oviducts and have no specific function and no role in reproduction. In most cases, fertilization of the female frog's eggs takes place outside of the body; the female releases her eggs, and the male fertilizes the eggs immediately with his sperm. Once the eggs are fertilized, it is common for the female frog to abandon her eggs in a moist area. The length of time between fertilization and hatching of the eggs depends on the species of the frog.