The hair cycle normally consists of growing, resting and falling hairs and there is a delicate balance between these stages of hair cycle. Normally hair should regrow but if it is not happening, you should consider seeing a dematologist. Further information is in the following weblink https://www.aad.org/public/diseases/hair-and-scalp-problems/hair-loss Hair transplant has advanced many folds and most of the cases fit in but still you should decide the procedure after a thorough understanding, the pros and cons and the cost involved. All the best.