Frogs most often symbolize transformation as they go through several throughout their life cycle. Frogs can also symbolize fertility because of the large amount of eggs they can lay.
In Western and European cultures, the three stages of a frog's development can symbolize the holy trinity or the notion of resurrection, which can be seen in some works of Christian art. In Chinese cultures, frogs symbolize good luck, representing "yin" energy, and are often used in Feng Shui to promote healthy family lives. Some Celtic cultures use the frog to symbolize healing as the frog was deemed the ruler of the Earth and is responsible for bringing the rain, which has a cleansing and healing connotation.