Idiots, more especially it would seem idiot girls, tend to show a
highly developed hairy system. Thus Voisin, when investigating
150 idiot and imbecile girls, found the hair long and thick and
tending to occupy a large surface; one girl had hair on the
areolae of the mamma. (J. Voisin, "Conformation des organes
genitaux chez les Idiots," _Annales d'Hygiene Publique_, June,
1894.) It should be said that in idiot boys puberty is late, and
the sexual organs as well as the sexual instinct frequently
undeveloped, while in idiot girls there is no delay in puberty,
and the sexual organs and instinct are frequently fully and even
abnormally developed.
Hegar has described an interesting case showing an association,
of foetal origin, between sexual anomaly and abnormal hairness.
In this case a girl of 16 had a uterus duplex, an infantile
pelvis, very slight menstruation and undeveloped breasts. She was
very hairy on the face, the anterior aspects of the chest and
abdomen, the sexual regions, and the thighs, but not specially so
on the rest of the body. The hairs were of lanugo-like character,
but dark in color. (A. Hegar, _Beitraege zur Geburtshuelfe und
Gynaekologie_, vol.
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