do you mean a culposcopy? (sp?) Thats when they look at your cervix using a type of vinegary solution usually after an abnormal pap smear. The answer is yes it is normal to have it done. They may or may not decide to hold off on a biopsy until after the pregnancy if they think you need one
colonoscopy? Not before 13 weeks, and usually they will do a sigmioscopy instead. I had that done at 12 weeks with my 3rd.