How do I know if my guppy has given birth

Pregnant Guppy Signs of Delivery Boxy, squared-off look to the female’s abdomen. The gravid spot is very dark maroon or black. She grows still in the tank or seeks a place to hide. Change in eating habits, such as refusing to eat or spitting food out. Shivering or shuddering motions during contractions. More items… (source)
https://www.youtube.com/watch?v=eAbwqvHsG8Y
Female guppies are usually in labor for between 2 and 8 hours. Labor is usually an uncomplicated affair with the guppy giving birth to between 40 and 80 babies. (source)
Baby guppies are in danger as soon as their born, so it’s important to keep them safe. Keep them separated from the adult guppies, or at least give them hiding spots in the tank to avoid being eaten. Feed them often, keep them in warm water, and give them live food to allow them to grow quickly. (source)
https://www.youtube.com/watch?v=dg1PV6zzTu4
Guppies don’t give birth to all their babies at once. That’s because they don’t lay eggs like other fish. So, they have to give birth to one fry at a time. That is why they need more time for breeding than other fish. (source)
Guppies sometimes give birth only to females if the tank has too many fish. May 29, 2022 (source)
It is not uncommon for a heavily pregnant female guppy to need to rest during her labor. If you have a large, female guppy sitting on the aquarium floor, it probably isn’t anything to worry about. Give her a few hours and she will probably swim back up and pass the rest of her babies. (source)
Usually, guppies will give birth to live fry. How many though? A guppy female can give birth to anywhere from 2 to 200 fry at a time. This process will take up to 6 hours to finish. Apr 7, 2022 (source)
https://www.youtube.com/watch?v=VIt5CC0IVyw
It is recommended that a pregnant guppy be removed from the community tank, or isolated in a part of it, in order to give birth to her fry. (source)
Guppies are livebearers, which means, they give birth to live fry. The female guppy gives birth to 20-60 fry at a time. They usually give birth once every 30 days, until they become 2-2.5 years old. Usually, the female guppy will hide, when she is ready to drop the fry. (source)
A guppy that is about to deliver may experience contractions as she prepares to push her fry out of her body. Contractions may cause your fish to look like she is trembling or shuddering. This is usually a sign that your fish is about to go into labor. May 26, 2021 (source)