After the production of guppies, their abdominal state will change significantly, so we can first judge from this aspect. You can observe the size of their abdomen, if the abdomen is smaller, no longer round, then it may be the end of the birth. You can also observe the black spots on their abdomen, if the black spots disappear, then the birth is over.
In addition, you can also judge whether the production is finished by observing whether they continue to produce small fish. If they don't produce any new fish within two hours, they may have run out.
Sometimes, close observation of guppies is not possible, because it may make them frightened, so sometimes it is not easy to observe the state of production. Therefore, it can also be judged by observing the swimming state of guppy from a long distance. If it is in a productive state, the guppy will stay in a safe place all the time. If there is an increase in their activity and they begin to swim, it may be the end of production.
In the production of guppies, they will have been very quiet. After they have finished giving birth, they consume more physical energy and begin to look for food. If this phenomenon occurs, then they may have been produced. After the production, the mother fish needs to be kept alone. After about 3-5 days, they will be able to fully recover.