So suppose , if someone has already done his/her medical like 2 months ago.Why do you think your parents will have an advantage over processing times if they are here in Canada? If they want to visit, let them visit and let the course of processing take place. Take note that you have to take medical and if other requirements are asked for you and your applicants, so take that into consideration.
what do you think ? that person has to go for medical exam again?