Follicle Stasis in Leopard Geckos: What It Is
How it differs from egg-binding
Egg-binding (dystocia) involves fully formed, shelled eggs that can't be laid. Follicle stasis happens earlier in the reproductive cycle, when developing yolk follicles fail to either ovulate normally or be reabsorbed by the body — a separate condition with its own risks.
Why unmated females can be affected
A female leopard gecko can develop follicles as part of a normal reproductive cycle whether or not a male is present or mating occurs — this is part of why unbred pet females can still experience reproductive complications.
Signs to watch for
A persistently swollen abdomen that doesn't resolve over an expected cycle, lethargy, appetite loss, or general decline in an otherwise healthy female can point to a reproductive issue worth investigating rather than a normal weight change.
This needs a vet, not home management
Diagnosing and managing follicle stasis requires imaging and professional evaluation by a reptile vet — it isn't something to address with husbandry adjustments alone if genuinely suspected.
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A single adult leopard gecko needs a 20-gallon long tank as an absolute minimum, with a 36x18 in (40-gallon breeder) footprint now considered the recommended standard — plus a secure lid, an under-tank heater on a thermostat, a thermal gradient, at least three hides, and a shallow water dish.
Set up in this order: substrate, then heat source wired through a thermostat, then hides and water dish, then decor — and run the whole enclosure for at least 24–48 hours to confirm stable temperatures before your gecko moves in.
Hatchlings can start in a 10-gallon tank or tub, juveniles do well in 20 gallons, and adults need a 20-gallon long as an absolute minimum — with 36x18 in (40-gallon breeder) now the widely recommended standard, not just an upgrade.
Heat a leopard gecko enclosure with an under-tank heater and/or overhead heat source (halogen or deep heat projector) wired through a thermostat — a thermostat is mandatory, not optional, and heat rocks should never be used.
Leopard geckos can survive without UVB using dietary D3 supplementation, but current husbandry guidance now recommends low-level UVB (roughly 2–6% T5) as best practice — it improves D3 synthesis, bone density, and natural behavior, and views on it have shifted significantly from older nocturnal-species advice.
Keep ambient humidity around 30–40% across most of the enclosure, with a dedicated humid hide raised to roughly 70–80% to support smooth, complete sheds.