There is some wild theory out there about how Drogon went and had dragon babies when he disappeared during season 4 or 5 and Dany told Daario I think that she had no idea where he was.
This is batshit insane of course but is backed up by some maester someone quote that said dragons could change their sex like the flickering flame.
Found the article. Is Daily Mail like the national enquirer of the UK?
Viewers have insisted that there are a brood of baby dragons who have been growing in Westeros, and they are apparently set to appear in next weeks episode.
www.dailymail.co.uk