That couldn't be true cause my mollie had babies 1 month ago and about several days ago she had another litter, and with platties the same thing. So I don't think that's possible... I thought the same thing about the guppies cause one website I recently went to was about guppies and the other website I went to said live bearers in general. but I learned from this one website " let me see if I can find it on my search engine" but they stated any live bearer was capable of doing this. I just started looking at fish websites about a week ago, and this is where I was refilled with information. But 2 years ago I was more able to tell and talk about fish but every day I'm site searching for information and I look at peoples posts. 2 things could be wrong here 1. the website was wrong or 2. I misread it and posted false information. But that lies right by where the rules or what ever " don't believe everything you read"...