Information About Telogen Effluvium and Its Causes Telogen Effluvium – Ken Washenik, MD, PhD Telogen Effluvium See FAQs at the bottom of the page. Telogen is the last of the three stages in the hair growth cycle. After growing in the anagen stage, hair enters a short transition stage, catagen, before reaching telogen. Telogen is … Continue reading Telogen Effluvium