You want to outsource the histology portion of your preclinical study, so you must ensure the project remains GLP compliant. Good Laboratory Practices (GLPs) guide how “laboratories plan, perform, monitor, document and archive study activities in an effort to enhance the quality and validity of test data.” Preclinical research studies generating data for submission to the Food and Drug Administration (FDA) must adhere to these guidelines no matter where the study is conducted or who performs the work. This means that contract laboratories, like the one you may outsource your study to, are also subject to FDA surveillance audits.