Is it permissible to suffice with a doctor's certificate for marriage without undergoing expensive medical examinations, after ensuring freedom from infectious diseases?

A medical examination before marriage is permissible if there is a fear of an internal disease that might affect health and marital stability; otherwise, there is no need for it. It is permissible for a doctor to issue a certificate of freedom from diseases without a new examination if he has examined the patient before, or if the matter would necessitate revealing one's awrah (private parts) and both are certain of their well-being, or if the remaining examinations are not important and are very costly. There is no blame upon one who does so.