SK299- human biology. Chosen topics.

Random question, but I’m looking at doing SK299, and I’m really interested in the infertility chosen topic. To anyone that’s done SK299 before, do the chosen topics get released at the start, or do they not get released until after all the main blocks.

I’m just trying to plan the way I’m doing it, and might have to finish all the material/ do the TMAs ahead of time, so want to know if that’ll be feasible or not.

Thanks