On the topic of troll reproductive head canons. Some way I see reproduction functioning is when trolls reproduce the genetic fluid from both partners needs to stay warm in specific conditions to mix enough to produce a wriggler.
Now this is a point of contention if there are strictly male/female reproductive organs on trolls, or if both sexes have both a nook and a bulge. If this is the case the males would most likley have slightly larger bulges and smaller nooks, and the females would have smaller bulges and larger nooks.
Either way, when intercourse is had the genetic fluid from both is stored in the receiving trolls nook. For how long is up to them
Troll partners can go one of two ways. Deposit the mixed genetic fluid into a bucket and keep it on heat under a heatlamp or on a hotplate or something and wait until the drones arrive. Or keep it inside of them abd put it into a bucket right when the drones do arrive. Then of course the drones take the mixed slurry to the mother grub.
Or if they so decide on it, produce a grub on their own pretty much the same as human pregnancy and they wouldn't utilize a bucket. Though this is probably very taboo and usually not a good idea on alternia due to the adults needing to leave the planet. It would leave the young troll without a parent or lusi.