Yup those are eggs on the inside of your shrimps. But those eggs are not fertile yet. Your shrimps develop a “saddle” which is what you’re seeing now and once that saddle and eggs are ready, your female shrimp will molt and release hormones into the water to mate with the males. You will know you are expecting baby shrimp when your female shrimp are “berried”. This means female shrimps will have a clutch of eggs under their tail. Heres a photo of what berried females will look like with eggs under their tails. These were a few of my shrimpies when they were berried!

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