First, it is necessary to understand that hair loss in women is not the same thing as female pattern baldness. In the former, there is, indeed, hair shedding. However, this happens because of the hair growth cycle itself, which is divided into three phases: anagen, catagen and telogen.
The anagen stage: this is the most striking and the longest one — it can take years to be completed — as it is the phase in which the hair is constantly growing.
The catagen stage: in the catagen stage, on the other hand, the hair follicles pause this process, and the length of the locks gets stagnant. Then, that is when the third and final step starts: telogen. This phase lasts for about 2 - 3 weeks.
The telogen stage: this stage promotes the moment of hair renewal and lasts for about 100 days for hairs on the scalp and even more for hairs on the eyebrow or eyelash. For this reason, the old strands detach organically from the hair bulbs (the well-known shedding), opening up space for new strands to grow in their place, repeating the cycle from the beginning throughout its life.
Female pattern baldness, in turn, is a disease that affects women and causes excessive hair loss without having the hair going through its natural growth cycle. That is, when it sheds, it is not replaced by new strands.
Because of this, one or more areas of the head are exposed, leaving the skin exposed, increasing entrances in the temples and stretching the forehead. Baldness does not have a single specific cause, but it can be treated.