Pregnant Platy ?

[Michelle66]

My platy has had a fat belly, that is dark and rounded unlike my other 3 females.
She has been like this for nearly 3 weeks, is she pregnant ?
If so how long will I have to wait for any fry ? Should I put her in a nesting net ?
Hope you can help.

 

[Pleccy]

Do you have any males in the tank? Still even without males females can store sperm and reproduce for several months with no males present, so I would put my money on the fish being pregnant, platies breed very easily.