This section is from the book "Astrology In A Nutshell", by Charles Henry Webber. Also available from Amazon: Astrology In a Nutshell.
The time between these two points is generally considered to be nine months, or exactly three quarters of the wheel. If the conception then was March 21, the birth would be December 21, (approximately). In this time Neptune and Uranus would have moved but slightly. Saturn not more than nine degrees, Jupiter about 20 degrees. Mars about 135 degrees, Sun, three-fourths of the circle, Venus gets around the sun about once and a quarter times. Mercury gets around the sun about three times and a little over. The Moon moves around the earth about 10 times. If a conception then takes place with Sun in Aries it would be in Capricorn (a square) at birth. Neptune, Uranus and Saturn at birth would be in the same sign as in at conception, unless perchance, they were at the end of one sign at conception. Jupiter may or may not have passed out of the sign in at conception. Mars, at birth is not far from a trine of his conceptional place. Venus is not far from a square to its conceptional place. Mercury is within 30 degrees of his own place, and by the ordinary method of figuring, the Moon is not far from the angular position which it held to the other planets at the conception. This statement is based on the average motion of these bodies.
There would, doubtless be many modifications, perhaps, in special cases, by figuring on what are termed, the "fast and slow"movements of the bodies, but, such figuring would more particularly relate to earth motion, causing an apparent motion to the planets. In spite of the many apparent intricacies in these apparent movements, it is held, that "order is heaven's first law,"and the planets, and the heavens, as a whole, move by a regularity of motion. We claim that the Sun, by coming at birth, to a sign of the same virtue (cardinal, common or fixed) that it was in at conception, is the prime factor, and does not change the individual inherited qualities at the birth, from the qualities of the major influences at the conception. The major influences are impressed by the superior planets upon the sun, in square to its birth point. This is on the line of what is known as destiny, because counting the sun's movement, after birth, as "a day for a year,"the sun at 90 years of age (approximately) returns to the same part of the heavens that it occupied at the time of the conception, and the child from birth to death lives out the influences of the third quarter of the circle.
The inferior planets, Venus and Mercury, together with the Moon, play the greatest parts in the varying life expressions on earth. These, with the life energies of Mars, play the greatest part in the affairs of the parents from the conception to the birth, and it is these lower sentient forces that differentiate, if at all, between the influences of conception and birth and, those self-same differentiations will most assuredly denote what the sentient conditions of the parents have been, between the time of conception and time of birth, and the child thereby inherits at birth - in addition to the superior influences of conception, practically unchanged - the qualities which the parents have further equipped the child with on its journey of life for weal and woe.
 
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