Medical astrology ( traditionally known as Iatromathematics ) is an ancient medical system that associates various parts of the body, diseases, and drugs as under the influence of the sun, moon, and planets, along with the twelve astrological signs.

Medical astrology posits the association of each sign of the zodiac with parts of the body, and was already mentioned by Marcus Manilius ( 1st century AD ) in his epic poem ( 8000 verses ) Astronomica.