Trials should be registered before the first participant is recruited.
An appropriate representative of the trial’s primary Sponsor. The Responsible Registrant is responsible for ensuring that the trial is properly registered. The primary Sponsor may or may not be the primary funder.
The registration of all interventional trials is considered to be a scientific, ethical and moral responsibility
A clinical trials register is the formal record of an internationally agreed minimum amount of information about a clinical trial. This record is usually stored in and managed using a database. A clinical trials registry is the entity that houses the register
All clinical trials meeting the above definition should be registered. Thus, early and late trials, trials of marketed or non-marketed products, randomized or non-randomized trials -- all should be registered.
For the purposes of registration, a clinical trial is any research study that prospectively assigns human participants or groups of humans to one or more health-related interventions to evaluate the effects on health outcomes.