How do we look up a drs background to find their ethics regarding experiments and abortion?

Ask. Since abortion is legal in all 50 states there is no registry or database to search. Doctors who do abortion usually advertize so you may identify by web searches or the phone book. 'experiments' can mean way too many things; abortion is definitely not an experiment. Doctors participating in clinical trials also advertize for study volunteers. As for their ethics, you have to ask the doctor.
Ethics. You ask a very complicated question in one way. In another way way the answer is simple ; there is no way to specifically answer your question as there's no way to look that up. You can't find a positive statement of someone's ethics unless they volunteer it. You can find out if your dr. Has been disciplined by your state but that is not going to tell you much.