Blue Tongue Skink Gestation Calculator

Blue tongue skink gestation averages 100 days, with most species falling in the 100–105 day range from confirmed ovulation to birth.

Select your species from the calculator above and enter the date ovulation was confirmed (visible mid-body swelling). Use the calculator for the exact expected birth date.

Blue tongue skinks are viviparous live-bearers, meaning the female retains developing young internally, nourished via a placenta-like structure, and gives birth to fully-formed live neonates rather than laying eggs. This is unlike most other lizards, which lay eggs (oviparous).

Yes. Many breeders brumate adult blue tongue skinks for 6–8 weeks in cooler months before the breeding season, since this cooling-and-warming cycle is believed to help trigger reproductive readiness, closely mimicking seasonal cues from their native Australian and Indonesian habitats.

A litter typically contains 5 to 25 neonates, though litter size varies by species, the female's age, and body condition.

House neonates individually to prevent food competition and tail-biting, with a basking spot around 95–100°F and a cool side around 75–80°F. Offer a mix of finely chopped vegetables, fruit, and appropriately sized protein (like small crickets) dusted with calcium, starting within a few days of birth.

Northern, Indonesian, and Halmahera Blue Tongue Skinks average around 100 days, while Merauke Blue Tongue Skinks run slightly longer at around 105 days.

At 100 days, blue tongue skink gestation is close to a Boa Constrictor's 110-day gestation (both live-bearers) but considerably shorter than most egg-laying lizards of a similar size, such as monitor lizards (165 days).