how do you tell if you have a pregnant cricket?

[kokom05lb]

I received 1500 crickets from mulberry farms on may 10. Will I use 20-25 crickets a day and I looked in on my crickets today and looked like there was more than usual. I've come across a couple babies. But how do you til if you have a pregnant female?

 

[htownsoccer00]

I have noticed mine to be much fatter. If you see the females digging or putting their ovstipors(butts) into the substrate that means she is laying.