pregnant guppy?when will it give birth?

[lvides]

hi, i bought a guppy and she is apparently pregnant so i moved her alone in a gallon tank, she also isnt eating, im wondering when will she give birth(if pregnant)?because i dont want to have her much in there.

 

[lvides]

can you see the image i uploaded? or is it only me that cant see it( new to the site)