Rules for choosing surgery dates

The Planets and Operations
(Many thanks to Eileen Naumann for her book Medical Astrology)
The positions of the planets and luminaries often determine the best and worst times for a person to undergo surgery. Following are guidelines for planning operations astrologically:
Try to plan an operation five days before or after the new Moon. At this time, fluids are at their lowest ebb; consequently, there is less chance of swelling.
Avoid operations five days before or after a full Moon. At this time bodily fluids are at their highest and can cause excessive swelling, hemorrhaging or seepage from wounds.
A day in which the Moon is void of course is a bad one for surgery. On such a day there is a good possibility that the operation won't be performed correctly, that complications will arise or that a second operation will become necessary.
Avoid an operation on that part of the body ruled by the sign in which the Moon is transiting1.
Avoid surgery when the Moon is in a mutable sign�?Virgo, Gemini, Pisces or Sagittarius.
Try to plan an operation when the transiting Moon is in a fixed sign�?Taurus, Leo, Scorpio or Aquarius. With such a placement the operation should go as planned, the surgeon’s hand should be steady, and no further complications should arise.
Avoid surgery when the transiting Moon is combust or within 17 degrees of the natal Sun, Moon or Mars.
Avoid surgery when the transiting Moon is square, opposite or in conjunct the natal or transiting Sun, Mars, Saturn, Neptune, Uranus or Pluto. Mars in a tension aspect with the transiting Moon can mean excessive bleeding or inflammation after surgery. Saturn can mean chronic or very serious complications.
Try to plan an operation when the transiting Moon is sextile or trine to natal, progressed or transiting Venus, Mars, or Jupiter. Such an aspect will help the surgery go smoothly. The transiting Moon sextile or trine Mars will also help insure that the surgeon will have a quick, clean cutting hand and will know what he or she is doing.
Avoid surgery when Mercury or Mars is retrograde. Mercury retrograde can mean misunderstandings, mistakes, and confusion. Since Mars is the planet of surgeons, when it goes retrograde surgeons tend not to be at their steadiest or most reliable: they may not be able to concentrate well. Furthermore, Mars retrograde can mean heavy loss of blood.
In addition to Eileen Naumann’s excellent guidelines, I would add that one should always consider the transiting aspects in the sky, particularly Mercury and Mars. Avoid surgery when either of these planets is under stress, either in the sky or in your chart. Look for days when they make easy aspects (trines and sextiles) with natal and transiting planets. If the surgery is cosmetic, look for a date when Venus is well placed