I am 18 month post-op, do you think this is the best I can have? (Photos)

12-14 months gives you the fınal result of your operation. In order to prevent the hair from fallıng you can use hair supplements.

It can take 6 to 12 months after surgery to see results.  If you are concerned it is best to contact your doctor

Without pre-op photos it is difficult to evaluate your results but everything looks very nice.You may be losing untransplanted hairs through the natural progression of male pattern baldness.This can be slowed or stopped with adjuncts such as Minoxidil ,Finasteride ,Low Level Laser Light and/or PRP(Platelet Rich Plasma).

At 18 months after transplant, you are looking fine and I would not expect more growth at this point in time.