I read top tips...

Best way to tame these is skiff into trap if you're that far advanced. If not a drake works great to lead them into a trap. Once you have trapped, use light pet and tame to get it hurt (watch for blood spots), turn off light and attack until you see pink glow. Watch out for tail whip and spikes, then she'll grab you.

Once about to birth, fill your inventory with meat (don't use pheromones), give birth in a 1x1 box, claim, and let it eat/kill you. It takes all your inventory and you don't have to hand feed.