Above is commonly referred to as shock loss. It is not uncommon for patients to go through a period of time after surgery where they have less hair then when they started. This is a normal occurrence.
The product topik is a good method to utilize in this uncomfortable time period.
Usually shock loss is the period from immediately after the procedure through the first four months. This is the patient 7 months later where not only did he recover his shocked hair but now has a boat load of new hair that has come in. He also has at least 5 more months of improvement to come.