Why Is Her Back Curved.....again

So it happened to a guppy of mine before and she died, and it's happeneing again to this female just slightly different. Basically shortly after she has her fry their backs start bending down and the stay at the bottom more and have a harder time swimming around. Is this just because she had a hard time having babies and sorta broke her back type of thing or is it a disease? Included is a bad picture but it's the best I can do.

thanks for any help

was watching a simular thread yesturday and a bent back means some sort of internal parasite, your tank may needs to be treated for this

Thank you, found that, will monitor for red poo but have not seen any yet. Don't know how she would have gotten internal parasite though, will test water levels again tomorrow but two days ago when i checked all have been good, I've never had bad levels. Kind of strange that she got sick right after she had fry just like last time?

thanks

it happens out of the blue, nothing to do with you doing anything wrong, this blasted things come in with new arrivalssuch as snail, fish plants, just ne of those things, i would treat regardless of the poo results, better to be safe than sorry

All right, funny thing is I didn't add anything to the tank been only buying SW stuff, o well.