I think its because both females bred with each other. Usaly if that happens the eggs very possible that they'll become infertile. And how old is the male? If its less than
1-1,1/2 year old, it won't and defenetly will not breed.
Geckonex, you need to do a little more research before you start giving horrible information.
How the heck can females breed with each other?
If they wern't leopard geckos i believe she wouldn't of posted in the leopard gecko forum.
A 1 1/2 year old male IS old enought to breed. Age had very little to do with maturity, its the weight that plays a big part. My 3/4 year old male has breed and produced offspring because he was 65 grams.
There are several reasons that your eggs are infertile and Eliza basically told you the best information that has been on this thread.
Possiblities are:
1. First year breeders sometime lays slugs.
2. Male could be infertile
3. Variable in the tank such as low heat, high heat, supplementation, and etc.
4. Not big enough to breed(WEIGHT)
Listen to Aliza and just wait and see what happens. If all the variable are good such as enviornment, supplements, and weight then its not your fault and its probably something you can't control. If it ends up that none lay fertile eggs then it might be your male.
Also Geckonex change your profile signature because you obviously ain't a master of leopard geckos or you wouldn't be given this information to people.