What are good bioengineering related topics that I can write a technical report on?

Question

I have trouble finding a topic for my English Technical Report class, specifically a bioengineering related topic. The topic must entail a problem, so that I can write a proposal and the report on it. If possible, I would like more than one solutions, so I can do a comparison and extend the report. The report has to be like 25 pages long!

An example of such topic (but I cant use) is:
A Comparison of Two Types of Bariatric Surgery: Roux-en-Y Gastric Bypass and Laparoscopic Adjustable Gastric Banding

Answer 1

The dangers posed by GE products and steps that should be taken to protect consumers from them.