Could be, but I can't really see very well.
It's possible to see the eggs through the belly and they usually have two.
This is a young female and it's possible that she would only have one egg.
Could also be infertile.
I guess she's probably about a year old. They can lay eggs at that age, but it's quite stressful for them. You should watch her carefully and give her some shaved cuttlefish bone calcium to eat. Also give her enough D3 + other witamins.
I usually separate my elegans by sexes when they are about half a year old and don't put them back together until they are at least 1.5 to 2 years old.
Is she separated from the male?
Matjaz