How can you tell if a female guppy is pregnant?

How can you tell if a female guppy FISH is pregnant?

When it does dark

 this will prove that your guppy is pregnant

 It may be orange or dark in the beginning

 but through it can change WITH TIME

 between orange & dark 

You can tell that your guppy 

is very close to having the babies 

when you can see little dots 

THOSE DOTS ARE

the baby guppies eyes

 in the gravid spot

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