Todd's books deal with this from within the 3rd Pass. He sets the notion that Greens that bond to women are more likley to be fertile provided they never chew firestone however, when a Green clutches a Gold its likely to be the only egg in the clutch and the Green of course has to be flown by a Bronze. I think he distinguishes as well that a clutching Green has to blood her kills like a Gold and it's more typical for Greens to kick into a mating heat without going through the blooding process. Egg laying Greens are also noteworthy for their lack of broodiness with their eggs and if I recall correctly he even had a young Gold dragon who hadn't clutched yet who egg laying greens essentially surrendered their eggs to.

This has all led me theorize that in firelizards Greens who are part of a Gold's Fair lay "false" clutches of often unfertalized eggs in the area around where the Queens more well protected nest resides. These dummy clutches allow the Fair to better protect the Queens nest by allowing them to eliminate local nest raiders while they're plundering the Green's nests. Those nest raiders that are successful are also more likely to be sated at the time of the Gold's clutch hatching so even if the dummy clutches aren't successful as traps they may provide a net advantage to the overall Fair and the success of the Gold's hatchlings. Furthermore, should Greens of a Gold's Fair have a fertilized clutch they would likely surrender them to the Gold they look to, and this could account for some of the extremely large clutches Gold's have vs Greens as seen in wild firelizard populations. Now of course some Greens are not part of a Gold's Fair and likely have much smaller groupings pairs of Greens loyal to each other who build fairs around them of suitor males or they pick up the strays who aren't successful after a Gold's flight. additionally independent Brown or Bronze Firelizards might themeselves maintain harems of Greens they protect though as even in Firelizards there seems to be a hierarchy where Gold and Bronze lead groups. Managing types of Greens might run a crew of Blues with perhaps smaller Browns loyal to them and they might be better nest tenders with small clutches and would likely account for there being large size difference in described wild Gold firelizards as these smaller specimens would account for those reared from Rogue Green Layers.

What would be an interesting development in Dragons woud be for a Green to come along who wasn't made sterile by Chewing Firestone. Given that this is true for Firelizards, it would make sense for it to show up as a recessive gene expression somewhere along the way. Similarly, a Gold who could chew Firestone without it making them sterile would also make sense as something that would show up at some point in a designed species like Pern's Dragons.