According to Hippocrates, “Touch not with iron that part of the body ruled by the sign the moon is transiting in.” Another way of saying this is: Do not perform surgical procedure with a knife (iron) on any part of the body which is ruled by the astrological sign in which the Moon is moving through at the time. So, if you are planning on having an excision involving your breasts, avoid having it when the Moon is in the sign of Cancer. Cancer rules the breasts. It also rules stomach and the womb. Taurus is the ruler of neck and throat, therefore, do not perform a tonsillectomy when the Moon is in Taurus. There are some other rules regarding when to schedule and not schedule a surgical procedure. This includes avoiding surgery during Mars retrograde or Mercury retrograde. Mars rules surgery. Mercury is the planet of communication. Another rule: Avoid surgery on the full moon and 5 days before and 5 days after. Another rule: Avoid surgery during the time the “moon-void-of course”. Moon-void-of-course means its the time when one sign leaves the moon and another one has yet to enter. It’s best to have surgery when the Moon is transiting a Fixed sign (Taurus, Leo, Scorpio, or Aquarius). Unless the body part that is cut upon is ruled by any of these signs. The Ephemeris or Farmer’s Almanac is a good place to see what astrological sign the Moon is in. When I learn that someone that sees me is planning on a surgical procedure, I like to look up the astrological timing to make sure the procedure will go well.