Leopard Gecko Life Cycle: Egg to Adult Stages

The leopard gecko life cycle runs from a two egg clutch to a hatchling of about 85 mm, then to a sexually mature adult at roughly 16 to 24 months. Captive lifespan figures range from about 5 years on average to a reported maximum of 28.5 years. This guide follows each stage.

Leopard Gecko Life Cycle Stages at a Glance

The leopard gecko life cycle has few published age markers, and only some numbers below come from sources. The juvenile and subadult ages are common keeper practice, because no source we could open gives a month by month chart. Treat them as rough guides and judge by weight and body condition.

Egg and Incubation

Females bury their eggs in damp substrate. Clutches almost always hold two eggs, each about 28 x 15 mm. A healthy female may lay up to six clutches in a year, although the San Diego Zoo describes the number per season inconsistently.

Eggs hatch after 45 to 53 days at 28 C. Sex is set by incubation temperature, a system called temperature dependent sex determination. At about 26 C most hatchlings are female, at 29 to 31 C the sexes come out roughly equal, and at about 32 C most are male, according to the San Diego Zoo.

Parents give no care beyond burying the eggs. Our leopard gecko breeding guide covers pairing, egg care and incubator setup. This page stays with the stages.

Hatchling Stage

A newly hatched leopard gecko measures about 85 mm and weighs 2 to 5 g by the San Diego Zoo figure, or 6 to 8 g by LafeberVet. It lives off its yolk for the first week and starts eating after its first molt. Geckos also eat their shed skin, which Animal Diversity Web notes as normal behavior.

Every stage of the leopard gecko life cycle changes what it eats, starting small. Common keeper practice is to offer insects no longer than the space between the eyes, dusted with calcium. Merck advises dusting insects with a high calcium supplement immediately before feeding, and the leopard gecko diet guide gives full feeder lists.

Hatchlings are banded, and the pattern breaks into spots as they grow. A 2024 University of Geneva study in PNAS found that the change happens after the first few months of life. It coincides with the loss of the iridophores that help form the bands.

Morphs vary a lot, and our leopard gecko colors and morphs page shows the range.

Juvenile and Subadult Stages

After the first weeks, growth is the main task. A hatchling must gain roughly 45 to 75 g to reach adult weight, so juveniles eat often.

VCA veterinary guidance is to feed juveniles every 1 to 2 days and adults 2 to 3 times a week. LafeberVet lists once daily feeding for adults. Authorities differ on the adult schedule, so body condition should decide.

Juveniles shed more often than adults because they are growing. Merck notes that reptiles need higher humidity during ecdysis, and that arid species such as this one do best with a humid microclimate while shedding. Stuck shed on toes is the usual problem to watch.

The subadult phase has no firm definition. In practice it means a gecko close to adult length but not yet at breeding weight. The San Diego Zoo gives about 30 g as the weight at sexual maturity.

Size and weight have their own guide, and so does baby care. This page only places them in the sequence of stages.

Adult Stage and Breeding Years

In the leopard gecko life cycle, sexual maturity arrives at about 18 months in Animal Diversity Web, citing Hunziker (1994). Captive bred animals mature between 16 and 24 months in the same source, citing de Vosjoli (1990).

The San Diego Zoo gives 18 to 24 months. AnAge lists 400 days for both sexes, and LafeberVet gives 9 to 18 months.

Adult females measure 18 to 20 cm and males 20 to 28 cm. Adult weight is 50 to 80 g. Animal Diversity Web gives about 8 inches for typical adults and up to 10 inches as rare.

Maturity is a matter of weight and age together, not age alone. A female bred too light can struggle to lay, and a gecko that looks gravid but does not lay needs a reptile veterinarian.

We found no authoritative source for how many years a female stays productive. Ongoing egg production also drains calcium and body weight, so keepers who breed should plan recovery time between clutches. General husbandry is covered in the leopard gecko care guide.

Senior Years and Lifespan

No opened source defines when a leopard gecko becomes a senior or lists aging signs. Common keeper practice treats geckos past about 10 years as older animals, though this is a rule of thumb. Weight loss, reduced appetite, cloudy eyes and difficulty shedding are reasons for a reptile veterinarian visit at any age.

Published lifespan figures for the leopard gecko life cycle disagree, as the table shows. All of them describe captive animals, since a wild lifespan is not stated in the sources we opened.

The gap between a 4.9 year average and a 22 year report likely reflects early deaths from poor husbandry or breeding losses in some datasets. That is an interpretation, not a finding from the sources. A well kept gecko can plausibly live well beyond 10 years.

Seasonal Changes Across the Life Cycle

In the wild, winter temperatures can drop to about 10 C, which prompts semi hibernation underground, according to the San Diego Zoo. Merck says the species does not require hibernation in captivity. The two statements describe different settings, so a captive gecko does not need a winter dormancy to finish its life cycle.

Leopard geckos are native to Afghanistan, Iraq, Iran, northwest India and Pakistan, in dry and semi dry deserts and arid grasslands. They are nocturnal and shelter under rocks or in burrows by day. The gecko care overview compares them with other pet geckos.

Handling Across Life Stages

Reptiles carry Salmonella more often than other pets, even when they look healthy. The CDC advises washing hands with soap and water after handling a reptile, its food or its waste. Children under 5, adults 65 and older and immunocompromised people carry higher risk at every life stage.

The main leopard gecko page has the species overview, including origin and basic traits.

Frequently Asked Questions

How long does a leopard gecko take to become an adult?

Sources put sexual maturity between 16 and 24 months, at about 30 g. Weight is a better marker than the calendar. A slow grower fed well may simply mature later.

Can you tell a leopard gecko’s age by looking at it?

No source we opened gives a reliable visual age guide. Size and pattern change in the first year, but adults of the same age can differ widely in weight and length. Hatch date records are the only dependable answer.

What temperature decides the sex of leopard gecko eggs?

The San Diego Zoo reports mostly females near 26 C, roughly equal numbers at 29 to 31 C and mostly males near 32 C. Animal Diversity Web gives 45 to 53 days to hatch at 28 C. Because incubation temperature fixes sex, small changes matter.

Do leopard geckos eat right after hatching?

Not at once. They live off the yolk during the first week and begin feeding after the first molt, per the San Diego Zoo. They often eat the shed skin.

Does a female leopard gecko stop laying eggs at some age?

No authoritative source gives an age at which females stop laying. Egg production drains calcium and body weight, so a female that looks gravid but does not lay, or that loses weight while breeding, needs a reptile veterinarian.

Is the leopard gecko lifespan 10 years or 20?

Sources differ. VCA gives 10 to 15 years for a well kept pet, LafeberVet 25 to 30 years, and AnAge lists 28.5 years as a maximum. Treat the longer figures as best case outcomes.