Ethics in clinical research means making sure that people who are part of medical experiments are treated fairly and with kindness. This includes making sure people know what the experiment is for and giving them a chance to say if they want to be part of it. It also means making sure that the experiment is safe and won't hurt people. Sometimes, doctors might need to do a test that could make someone sick, but they have to explain this clearly and make sure that the person knows all the risks before they say yes. It's important to be ethical in clinical research because it's the fair and kind thing to do, and it helps make sure that everyone who has medical tests is treated well.