Is my platty pregnant?

[johnaqua]

Hi im new to aquariums and my platties are about 2 months old in my tank. And it seems that their bellies are bit big. I dont know if its just the magnification of the water/glass that make it look bigger?

But i searched online about gravid spots?
One of my platy has a black area at the back part of her belly.

I feed them once a day only.

Please see the pics

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[Tyler_Fishman]

Very pregnant, she will give birth soon, isolate her from the school to make sure the young survive

 

[johnaqua]

The belly doesnt bulge on the sides? I dont know if its pregnant or not.

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[johnaqua]

Heres a closer look in the cage.

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