Minoxidil may speed hair growth and help thicken weak vellus hairs, but the results are varied.
As a mature physical characteristic, chest and abdominal hair is coarser, thicker, and more unruly than vellus or "peach fuzz" hair that is routinely associated with children or women.
Vellus is sometimes called "peach fuzz" and is often colorless.
Intermediate are hairs that are between the vellus and terminal stages.
As women age, their fine, vellus hair converts to terminal hair, growing longer, darker, and coarser.