Hmm... So, did the pterosaurs merely mate early and retain the sperm for reproduction later in their adult life, or did they lay their eggs and do the whole shebang before full adulthood?
The reason is that either scenario presents different problems from an evolutionary standpoint. They should probably answer these questions before posing wacky theories like this.
Well, my dog had to be neutered by 6 months, due to being sexually mature by then, but was not fully grown until age 4 (mastiff). The females are supposed to be 2 yo before they are bred, because they need to be more mature in order to breed safely.
Chickens lay eggs at 6 months, but I doubt they can be fertile, they’re just little pullet eggs.