Make sure female guppy isn't prego

[Niccobacci11]

So I have these three female guppies that I want to breed with some of my cobras that I have previously bred them with my full body reds and they haven't been in the same tank as a male in a few months they have each dropped three batches of fry with no males around. So I understand that they can hold sperm from a male for numerous months and continue to have fry so I want to know how will I know when they are out of sperm and are ready to breed. Also if they drop a batch and then I put them in with my males will they choose the new males sperm over the older stuff. I want to make sure that when I put her with the male she gets prego with him not the older male.

If you need any clarification please ask rereading this made me a little confused. Thanks for the help anyone who responds.

 

[MICEY]

your best bet would be to find some real small female fry seperate them and then breed those to the males you want to , they can hold sperm up to 6 months

 

[Toad]

Or just let them continue dropping until they stop having any fry at all, then you know they will be 'empty'. Not sure if you have the time for that though :/


Sent from my iPhone using Aquarium Advice