Thank you for your question. You are 21 days after your hair transplant, and asking if it’s normal for newly transplanted hair to grow so quickly after a transplant, and when you can expect the hair to shed. I can certainly give you some guidance about this, without a photo of your hair grafts for reference, and without a physical exam. I’m a Board-certified cosmetic surgeon and Fellowship-trained Oculoplastic surgeon. I’ve been in practice in Manhattan and Long Island for over 20 years. I’ve been performing hair transplants since I started my practice, and have been prescribing finasteride to male pattern hair loss patients since 1997. I’m also the founder of TrichoStem Hair Regeneration Centers, based on a system originally developed to help hair transplants and the donor area heal better, but has since become a non-surgical treatment for pattern hair loss for men and women. It is completely normal for hair grafts to continue growing immediately after a hair transplant. I say continue because hair grafts do continue to grow after they are harvested, then transplanted. As for when your grafted hair will shed, this is impossible to tell. About 8-10% of total scalp hair sheds or is in the resting phase where they are not growing at a given time. The timing of when your hair sheds cannot be determined as it relies on where you currently are in the hair shedding/growth phase. Shock loss, where the trauma of transplant surgery makes native and transplanted hairs shed soon after surgery does not happen to all patients, and it doesn’t sound like it happened to you. I suggest you just wait about a year for your full transplant results to be realized. Keep in mind that a hair transplant does not treat progressive pattern hair loss, so I recommend a DHT-blocker like finasteride to slow hair thinning, and a treatment like our Hair Regeneration PRP+ACell treatment to thicken thinning hair, and stimulate growth from dormant hair follicles that are still viable, but currently not growing. Actively managing hair loss after transplant can improve coverage and transplant results further, as well prevent or delay the need for additional hair transplant surgeries. I hope you found this information helpful. Thank you for your question.