Blood Breeding Question
 

So I decided a while ago that I'm not going to breed, but I am still going to buy snakes that in case I change my mind that I will be able to breed what I have. So here is the question. I've read that Blood Python females wont breed if purchased as adults. I am looking to purchase a 4 year old T- Female to go with my male. So is it true that Blood python females wont breed if not purchased as a Juvenile?