How do you tell how far along a guppy is in pregnancy?

To determine how far along a guppy is in pregnancy, you can observe the size and shape of her abdomen, which will become increasingly rounded as she approaches birth. Additionally, the presence of dark spots near her rear, known as the gravid spot, becomes more pronounced as she nears the end of her gestation period. Typically, guppies are pregnant for about 21 to 30 days, so tracking the time since mating can also provide an estimate of her progress. Lastly, you may notice her seeking out hiding spots as she prepares to give birth.