How long until my guppy will give birth?

[Aidenfadil]

My guppy has been pregnant for a couple of weeks and the Gravid spot is getting darker. Does anyone know when to seperate them into a breeding box as I have one that I can set up to catch the baby fish when she gives birth. If anybody knows when to isolate her please let me know. Thanks!

 

[Littlebudda]

Still looks a fair way off they will go very square towards the back of the stomach.
If you have lots of plants it may be better to leave her be it can cause way more stress for the fish than needed.
I take my cuttings of my live plants and let them float on the top of the tank while they grow roots this then provides plenty of hiding spots for the fry.

 

[emeraldking]

Well, it's a bit hard to tell. Simply because of the fact that not all female guppies will square off at the end or have a very large belly for that matter. That differs per individual female. When the belly squares off, it only means that a female has used her max gestation period. Nothing more, nothing less.
The way she looks right now could already mean that she's almost due. For she's already pregnant for a while.