When Will My Platy Pop?

[darnit20]

hiy i need some help...i have a pregnant platy...her last babies r roughly three weeks old and she is pregnant again her belly has really filled out in the last couple of days and i can see some dark spots in her belly.
I recently (unfortunatly) was given some rather nasty swordtails which ate some of my last babies so i got a guppy breeder for her but dont want to put her in untill the last day or so.
Im pretty sure she is very close but is there any other physical signs they show?

 

[Ally555]

You should try posting this in the Livebearer section. The people who go in that forum will know!!!