You can name almost any organ or body part within you, and chances are, some type of relevant research has been made with 3D printing technology. From 
Dr. Monica Laronda
Northwestern University Researchers 3D Print First-Ever Functional Ovary
The team’s research, which is entitled “Bioengineering an Artificial Ovary with 3D Printing”, was presented at the Endocrine Society’s annual meeting in Boston, called ENDO 2016, which took place on April 2. Support for their breakthrough research came from The National Institutes of Health, the Burroughs Wellcome Fund Career Award at the Scientific Interface, and the National Science Foundation Graduate Research Fellowship Program, helping to put Dr. Laronda and her team on the forefront of reproductive healthcare. Another great thing about this research, aside from the potential benefits it can provide to damaged reproductive systems, is that this process can likely be used to help with other parts of our bodies as well. For example, the research team also feels that, someday soon, their research can be used to work on complex soft tissue replacement as well.
