Lanugo Hair is the first built since the baby in the womb when a soft, thin and light is shed from the womb (Shed in Utero).
Vellus Hair refers to hair that is longer than one centimeter line is thinner and lighter than the No Hair Medulla, as the hair around the face.
Terminal Hair mainly refers to the hair on the head (Scalp Hair) are longer than 1 cm thick, dark lines.