The reproductive cycle of the lizard Tropidurus itambere was studied in an open area near Campinas, Sao Paulo State, southeastern Brazil. Females had vitellogenic follicles or oviductal eggs only during the wet season, whereas males had large testes with spermatozoa throughout the year. Hatchlings were found from the height of the rainy season to its end (january to May). Mean growth rate was inversely related to snout-vent length. juveniles from eggs laid at the beginning of the rainy season could potentially have reproduced in the first wet season after they hatched.2712832