This is so awkward because I just signed up today and my first question was the same as yours.there stomach seems to buldge and they flap there fins a lot because they have to carry eggs.and the sorta stop a lot.mine is pregnant because the pet lady said so.
What Does A Pregnant Red Wag Platy Look Like? I Think Mine Might Be Pregnant! Can Someone Please Answer Me
I bought two red wag platys last night and today there were babies all over
I found a pic on this forum www.canadianaquariumconnection.com Not sure if it is the specific fish you are referring to but it was clear. If they are pale you can see a dark spot close to the rear, and the spot is fainter on the darker fish. The stomach compared to a males will get pretty big. Live breeders only have to mate once and their bodies store the sperm so she could continue to produce young without a male. If you want to keep the fry get a breeders net if not just let her have them as usual and most will become food.