Why do some legislators consider prenatal genetic testing to be unethical?

The Abortion Debate: Testing for genetic conditions introduces the ethical question : what to do with the information ? That's when the politics starts.

Pre-conceptions: If your personal belief system is that life begins at conception & man should never interfere with it after that point, you fight any process that might lead to an abortion. Rigid religious or political views exist and often complicate the process of doing what is best for families.