Gecko eggs typically hatch in 65 to 120 days. The exact time it takes for a gecko egg to hatch depends on the conditions of the incubation area.
Temperature is the primary factor that determines how fast gecko eggs will develop. Higher temperatures cause more rapid development, while lower temperatures delay it. However, higher temperatures may not always be best. A careful balance must be kept to prevent the incubator from getting too hot or cold because development that progresses too rapidly may result in underdeveloped hatchlings. Crested geckos that hatch too quickly may have underdeveloped crests. Geckos' sexes are also temperature-dependent, so lower temperatures tend to result in female hatchlings, while higher temperatures result in males.