Until now, Daenerys has been truly careless with her kids, who in addition turn out to be the most dominant weapon in Westeros. Viserion was killed by the Night King during the incredibly brainless Operation Capture a Wight.
And Rhaegal was killed when Daenerys somehow didn’t notice the enormous fleet of ships forthcoming her. That leaves her with only Drogon, her favorite dragon, who is helpless to Cersei’s huge crossbows.
But consider the possibility that Drogon is not the last dragon left in the earth? According to one fan theory that has been passed around the internet over the years, “in the fifth season, when Drogon spends almost a whole season gone, he’s actually laying eggs and is in fact a female.”
The theory has been brought back this week due to one thing fans caught in the promo for Episode Five. As one Redditor explained, “Euron Greyjoy looks up at the sky and hears a roar and gets scared. Since he has seen the dragons for a long time he wouldn’t be scared for just a dragon, but what if theres more dragons?“
Now, this sounds crazy since Drogon is a male, but George R.R. Martin’s books have made very obvious the complicated nature of dragon sex and reproduction. In Fire & Blood, Martin’s new history of the Targaryen reign, he in brief talks about the sex of Vermax, who was the dragon of Rhaenyra Targaryen’s eldest son Jacaerys Velaryon:
Mushroom also claims that Vermax left a clutch of dragon’s eggs at Winterfell, which is equally absurd. Whilst it is true that determining the sex of a living dragon is a nigh on impossible task, no other source mentions Vermax producing so much as a single egg, so it must be assumed that he was male.
Septon Barth’s speculation that the dragons change sex at need, being “as mutable as flame,” is too ludicrous to consider.
While this report casts doubt on Septon Barth’s claim that dragons can change sex, this issue is something that’s ardently debated within Martin’s source material. As the Game of Thrones wiki explains of dragon reproduction:
Historians, like Septon Barth, Grand Maester Munkun, and Maester Thomax, disagree on the mating habits of dragons. Dragons lay large, scaled eggs to reproduce. According to Archmaester Gyldayn, and agreed upon by Maester Yandel, the ability of a dragon to lay eggs is proof that said dragon is female.
When a dragon is never observed to have laid eggs, this is taking as proof that it must have been male. However, according to Barth and Maester Aemon, dragons have no fixed gender, but are “now one and now the other, as changeable as flame”.
Barth believed that dragons can change sex at need, but Maester Anson believes this to be erroneous, and states in his Truth that Barth’s statement is simply a misunderstood esoteric metaphor.
Surprisingly, given how much detail he goes into everywhere else, Martin doesn’t clearly say how Dragons mate and reproduce. However, considering dragons are gender fluid, it’s possible that Drogon, Viserion, and Rhaegal could have produced more eggs while off in Essos. One Reddit user also indicates actual (!) science and an ability called parthenogenesis in which reptiles can reproduce without a mate.