How do I know if my guppy is male or female

https://www.youtube.com/watch?v=VnuCLToYV-A
You can determine the sex of your fish by inspecting its gonads (reproductive organs), which are located towards the top of the gut cavity. Mature female fish will have orange ovaries and male fish will have white testes (see photos above). (source)
https://www.youtube.com/watch?v=dg1PV6zzTu4
To dispel misinformation and myths once and for all, guppies cannot change sex and are not hermaphrodites. Females need males to fertilize their eggs and produce offspring, but they will also store the males’ sperm several months for when males are not available. Jan 20, 2022 (source)
When they’re born, all guppy fry look the same regardless of gender. There’s simply no way of telling which is male and which is female. As they continue to grow, differences start to appear. These differences are subtle in the beginning, but as growth rate accelerates, they become more and more noticeable. May 23, 2019 (source)
Despite what television might have you believe, zombies aren’t running around and having romantic interactions with the living. Usually. But one species of fish does reproduce posthumously. Female Trinidadian guppies store sperm from males that they mated with. Jun 6, 2013 (source)
Researchers have identified more than 500 fish species that regularly change sex as adults. Clown fish begin life as males, then change into females, and kobudai do the opposite. Some species, including gobies, can change sex back and forth. The transformation may be triggered by age, size, or social status. (source)
As your female fish becomes pregnant, she will grow a bulge at the back of her abdomen. This typically appears over the course of 20-40 days. Does your fish have a red or black spot? Sometimes, when a female fish is pregnant, she will develop a “gravid spot” on the abdomen. Jul 27, 2017 (source)
Roughly 28 days. Keep reading to find out how do fish give birth in a tank. Jul 16, 2019 (source)
21–30 days Guppy. Guppies are highly prolific livebearers giving birth to between five and 30 fry, though under extreme circumstances, she may give birth to only one or two or over 100. The gestation period of a guppy is typically 21–30 days, but can vary considerably. (source)
Yes, they do. Though guppies are one of the calmest breeds and are generally pretty peaceful, they often end up eating their fry. This weird and disturbing activity is termed as filial cannibalism. (source)
Even when left on their own, guppies breed very rapidly. Therefore, consideration concerning future tank size and adequate filtration should be kept in mind. It is always wise to allow extra tank space for future guppy generations as well. A rapid maturity rate is one reason guppies are very popular for breeding. (source)
The easiest way to tell if a guppy is pregnant is to look for a dark spot under her tail toward the backside of the stomach. This dark spot is called a gravid patch and as the babies grow, this guppy gravid spot will increase in size while also becoming darker. (source)
You can keep only male guppies in a tank. However, when you keep only male guppies in a tank, you will see a lot of aggression and bullying among them. To spread out the aggression, it is recommended to keep at least 6 male guppies in a male-only guppy tank. May 14, 2021 (source)
https://www.youtube.com/watch?v=CzR_sfcK5sM