Female Guppies

Question
Do the female guppies always have a gravid spot or only when they are pregnant?

Answer
Hi,
Most female guppies will have a faint gravid spot even when they are not pregnant, but when they are, it is clearer and more pronounced as the fry's (offpring's) eyes develop inside the female.
Remember, guppies are livebearers, so they will not lay eggs, but give birth to live young.
Best wishes,
Kathryn