oky down near her anal fin you will notice she's getting plump right. If she is a lighter color like ornage, yellow, white, etc... You will notice stuff starts to appear in that area. She will get plumper and plumper until between 30-45 dyas when she will drop the babies, To know when to put her in the breeding net will be when you can see eyes in that area, becuas ethatmeans the babies are almost ready, i've noticed this with my livebearers