Molly fish is pregnant, is this poop normal?

[TropicalNewbie442]

Had the molly fish about 1 month now, have 3 females & 1 male. I know she is pregnant. But I've never actually had molly fish before so unsure if this is normal in pregnancy or something to worry about.
The white poop has only started this morning and this is her 2nd one from what I've seen.

 

[emeraldking]

Your molly isn't a molly but a female swordtail.
White stringy poop could mean that you've got internal worms.