Well my ball python breeding was successful this past season. Akina, my normal female laid 6 eggs on May 4th. One went bad immediately and proved to be infertile. That left 5 eggs. During the course of the 2 month incubation, we lost another 3 eggs. All of these were fertile with growing fetuses. The fetuses died and the eggs went bad. That left two eggs. I cut the eggs on day 57, 3 days before their expected hatch date of July 3rd or 4th. I found that one baby was severely deformed (head too small, missing one eye, kinked tail). He died in the egg, his umbilicus wrapped around his body. This left one little baby. She hatched on on July 7th and weighed in at 37g, half the size she should be, but with no deformities. She was popped and sexed as a female (though I will be getting a second opinion). We are hoping she is female and that in a few years we can breed her back to the father in hopes she carries the pied gene like her father.
This is how I found her on July 7th.
Sol I got from the Reptile Show here in Richmond a week ago. She is a sunglow leopard gecko. She eats like a champ and has already gained weight since arriving here. She came in at 16g and now weighs 18g. I plan on breeding her when she is old enough and big enough.
I would say its not common to lose so many eggs but it does happen from time to time. Sometimes whole clutches go bad for no reason. I think my problem was humidity. Towards the middle and end stretch of incubation I was having some humidity issues (not enough) and that could have caused the babies to die.
I'm looking forward to this upcoming season as I am breeding 3 females. I'm sure my second try at this will be better and I will be posting up lots of breeding, egg, and hatching pics.