My mom bought some platys they told her the one with the swordtail was a male and the other two were females. I don't know if that is true or not but whatever the case, we now have 18 baby platys. There were more but before we found them and could isolate them, some of them died and i'm pretty sure some of them were ate. And if its anything like i'm told, i'll have babies every month from each female.