Maestro della Fertilità dell'Uovo or Master of the Fertility of the Egg is the name given to a yet to be identified painter active in the second half of the 17th and early 18th century in Brescia. The name is based on a work entitled La fertilità dell' Uovo (The Fertility of the Egg), which depicts dwarfs, geese and lobsters hatching eggs and is in the collection of the Milwaukee Art Museum.

The art historian Mariolina Olivera was the first to isolate a group of works by this master in her 1990 monograph Faustino Bocchi e l'arte di figurar pigmei. She placed the master in the circle of Faustino Bocchi, an artist active in Brescia around the same time and known for his genre paintings with dwarfs. The master’s oeuvre distinguishes itself from Bocchi’s more dreamlike work through its biting, satirical edge.