1. Ten days post operation,
2. Two weeks onwards I believe,
3. Three - five months (depending on age it seems),
4. Unsure,
5. After around four weeks,
6. Two months onwards,
7. Six months onwards,
8. One year later.
Of course everyone is different, but these are around the average ball park.
A lot of users say that the full result is final by 18 months however this is the maturity of the hair rather than density.
You should follow the guidelines your doctor will provide you for aftercare, each doctor gives different guidelines also.
Here is my doctor's for example;