Androgenetic alopecia (AGA) is a widespread cause of hair loss, affecting millions of men and women worldwide. This condition is characterized by progressive hair thinning and miniaturization of the hair follicles, leading to visible hairline recession. The causes of AGA are multifactorial, involving genetic predisposition, hormonal imbalances, receptor abnormalities, stress, and unhealthy lifestyle practices. While AGA occurs in both genders, there are distinct differences in the manifestation of hairline recession between men and women.


Hairline Recession in Men: Male Pattern Baldness

In men, hairline recession often follows a predictable pattern known as male pattern baldness. The hairline gradually recedes from the temples, forming an “M” shape, and may progress to a horseshoe-shaped hairline, referred to as Type U in the classification system. The severity of hair loss can be further graded within each type, providing a comprehensive understanding of the extent of hairline recession.


Hairline Recession in Women: Diffuse Thinning


Women, on the other hand, tend to retain a more preserved frontal hairline even with hair thinning. Instead, they experience diffuse thinning of the hair across the frontal and side areas of the scalp, while the back of the scalp is usually unaffected. The hairline recession in women is typically categorized based on the shape and severity of hair loss observed.

The BASP Classification System


To classify and study the different types of hairline recession in AGA, researchers have developed the Basic and Specific (BASP) classification system. This classification system encompasses four basic types representing the shape of the anterior hairline (Type L, Type M, Type C, and Type U) and two specific types focusing on the density of hair on the frontal and topmost areas of the scalp (Type F and Type V). Each type can be further subdivided into grades, providing a more detailed assessment of the severity of hair loss.

Understanding Type F: General Decrease in Hair Density

Type F refers to a general decrease in hair density across the entire top of the scalp, regardless of the shape of the anterior hairline. It is divided into three subtypes (F1, F2, and F3) to indicate the mild, moderate, and severe levels of hair loss observed.

Understanding Type V: Thinning of Hair on the Vertex

Type V specifically focuses on the thinning of hair on the vertex or the top of the head. It is classified into three subtypes (V1, V2, and V3) to denote varying degrees of hair thinning, ranging from mild to severe.


Understanding the types of hairline recession in Androgenetic Alopecia provides valuable insights into the progression and severity of hair loss. This knowledge aids in personalized treatment approaches and helps individuals make informed decisions about managing their hairline challenges. With the BASP classification system, healthcare professionals can accurately assess and categorize hairline recession, allowing for tailored treatment plans that address each individual’s specific needs.

By combining scientific advancements and comprehensive classification systems like BASP, we can navigate the complexities of Androgenetic Alopecia and provide effective solutions to restore hairline aesthetics and boost self-confidence.



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