[center:6c2ce9f19d] Welcome to AA, jmusgrave!
That doesn't look good. I do not have any experience with pregnant livebearers, but it doesn't look pregnant. Is the fish eating more than normal? What are your water parameters (ammonia, nitrites, nitrates)? Is the water always cloudy, or is that the photo?
Look for information on internal parasites and isolate this fish. What other fish are in the tank?