It can be judged by the following methods:

1. The belly of the female fish is very swollen. Looking from the top down, the sides of the belly are arc-shaped and bulging, and there are fetal spots behind the anus. Turns red or black.

2. It is obvious that the anus protrudes a little outward.

3. If you have more black stools, the width of your stools will become wider.

4. I don’t particularly like eating.

5. Always stay aside quietly, repel other fish from approaching, and have a certain sense of alertness.

6. Always raise the tail from time to time.

7. Keep up with the feeding. At this time, the female guppy needs the most nutritional supply.