Writing a thesis statement is similar to setting up a benchmark for a research thesis. For best results, you should write a thesis statement at the end. Prior to that, you should plan the whole mechanism of your research. Outline of a thesis statement should be drafted, last thing.
Your thesis statement should concisely describe your standpoint for the topic that you are dealing with. For example your topic is: “Genetic Engineering: Virtue or Sin.” Let’s suppose you decide to build your thesis on the argument that genetic engineering is a virtue with associated benefits that surpass its evils. So you will have a thesis statement: “Beneficial aspects of genetic engineering surpass the notorious evils associated with it, provided a vigilant scrutinization is administered by government.”
Here, you not only state explicitly your point of view but give the extensive argument on the basis of which you are going to argue your case. While writing a thesis statement, you should keep in mind that the actual research should strictly prove the point that is mentioned in it. You can check out thesis statement examples to get a much better idea on how to write a thesis statement, effectively.