Birth Moment

What is generally accepted as the true moment of birth is the moment of the first inspiration of breath after ligation of the umbilical cord. At that moment the infant ceases to  receive blood conditioned through the mother’s receptivities, and in response to the law of  adaptability must grow channels of receptivity to cosmic frequencies that accord with those present in the Earth’s magnetic field, and through these receptivities it begins to condition its  own blood. This moment must be reduced to Standard Time, adjusted to Greenwich world-time  for calculating the planets’ places, thence readjusted to Local Mean Time at the birth place to  determine the Ascendant and the Midheaven degrees and the House-cusps. 

DeVore, Nicholas. Encyclopedia of Astrology. New York: Philosophical Library, 1947.