Is my female guppy pregnent and how soon she going to have them?

Question

my female guppy have a black spot she is acting different she go against the glass up and down too much and fast she stuck at the top of the tank and some times at the bottom is some body know how soon she is going to have a fry

Answer 1

pretty soon days before they give birth they start acting odd such as:

1. being away from the others

2. staying in one spot for a looooooooonnnnnnnngggg time

3. eating less/eating more

4. spot getting darker and darker

5. being a little moody

Answer 2

The fish will be getting bigger and have a black spot.

Expect baby guppies within the next 30 days or so.