If those are eggs about to develop and move towards the area under the tail to grow into fry , or a saddle before the eggs are fertilized, then it would have molted before they developed. Due to the clear spaces on the shell you can see inside better. I can see spaces where you have a clear line between segments on the tail.
Make sure you are feeding a high quality shrimp food with minerals for the shrimp to molt easily. And mama will molt after the babies leave.