OK, so it might seem like a silly question, but hear me out. I was reading through the Beast Codex, and looking at the Throdamas. Initially I thought that you had to breed two Throdamas with the pheromones that you want ready to use. But now I'm confused, because the beast codex said that you had to assign 1-3 worker Throdamas to a pregnant female, with the correct pheromones.

How do you assign Throdamas to a female? 

Once you have a pregnant female throdama, you will see the option to assign other throdamas to her at the bottom left corner of her profile page. If you need them, Timain gives more detailed instructions here (just scroll down a bit).

Thank you. :)