Cherry Schrimp With Eggs

Hi all,
I know i have just started my tank but have 5 rummynose tetras in and when i seen the cherry shrimp i couldnt resist. I bought 5 of the tiny wee things. Very excited to get them home i set about settling them in. when eventually i set them free in the tank i noticed 2 of the 5 had tiny yellow eggs in there clutches wow didnt see them on purchase and neither obviously did pet shop. 
The question is do the mothers carry the eggs until hatched or what happens?

Thanks