terminaalikarvakasvua

Terminaalikarvakasvu, also known as terminal hair growth, refers to the stage in the hair growth cycle where hairs reach their maximum length and thickness. This stage follows the anagen or growth phase and precedes the catagen or transitional phase, which then leads to the telogen or resting phase. Terminal hairs are the coarser, darker, and longer hairs that are typically found on the scalp, eyebrows, eyelashes, and pubic areas. They are distinct from vellus hairs, which are fine, short, and lightly colored.

The process of terminal hair growth is influenced by genetics and hormones, particularly androgens like testosterone. During puberty, hormonal changes stimulate the transformation of vellus hairs into terminal hairs in areas such as the face, chest, and limbs in males, and the pubic and underarm regions in both sexes. The duration of the anagen phase and the rate of terminal hair growth vary significantly among individuals and across different body areas. Factors like nutrition, health status, and certain medical conditions can also impact the quality and rate of terminal hair growth. When the anagen phase is prematurely shortened or disrupted, it can lead to conditions like alopecia, characterized by hair thinning or loss.