It takes around 2 weeks for me to receive my invitation to medical assessment.
Please make sure your passport(s) are valid. If you are confidence that you are going to pass the interviews, it is a good time for you to get your passport renewal.
If you wear glasses, you will need 2 pairs of glasses with prescription from optometrist.
The gap between the assessment and the final interview is a good time for you to get yourself prepared.
Hope to see you in the cockpit, all the best!