Research
Several influences may overlap
Female size, age, body condition, available energy, season, previous clutches and individual variation may all contribute. Across lizards generally, larger females often produce larger clutches, but that does not establish a precise prediction for every Central Bearded Dragon.
A large clutch can place substantial demands on the female. Egg number should not be celebrated without also considering egg quality, female recovery and the number of clutches produced.
Evidence limit
What cannot be promised
There is not enough species-specific research to assign a reliable percentage of clutch size to one factor such as feeding, male fertility or genetics.
Breeding records across multiple seasons are useful observations, but they remain specific to the animals, pairings and management involved.