depends on how much you feed it. One time, my neighbors' male guppy was AS ROUND AS A quarter!!!
The Gravid female will have the dark "gravid spot" in front of her vent. I can however assure you that if there has been a male in the same tank with a female guppy for any reasonable length of time she will be gravid.
it may be a femake or a FAT guppy
It might want to mate with it.
All that is needed is a male guppy in with her.
yes there are. that is how they get mates.
A female guppy has a darker brown line that is visible through its body. The male has a very light brown line.
That does not happen with guppies. They stay the same sex for life.
Your male guppy is female and with child.
If the fish has a "GONOPODIUM" it is definitely a male.
About 4 weeks.
it is mature.
Males have longer, more colorful fins, females can be smaller.