6. Of Males and Females.

Now that the topic of brethren has been brought before our eyes in suitable and natural fashion, the next step would be to begin the discussion of matters directly concerned with the birth, and first to treat of the reckoning of males and females. This is determined by no simple theory based upon some one thing, but it depends upon the two luminaries, the horoscope, and the stars which bear some relation to them, particularly by their disposition at the time of conception, but more generally also by that at the time of the birth. The whole situation must be observed, whether the aforesaid three places and the planets which rule them are either all or the most of them masculine, to produce males, or feminine, to produce females, and to produce females, and on this basis the decision must be made: We must however distinguish the male and the female planets in the way set forth by us in the tabular series in the beginning of this compilation, from the nature of the signs in which they are, and from the nature of the planets themselves, and furthermore from their position with reference to the universe, since they become masculine when they are in the east and feminine in the west; and besides, from their relation to the sun, for again when they rise in the morning they are made masculine, and feminine when they rise in the evening. By means of all these criteria one must conjecture what planet exercises preponderating control over the sex.

Ptolemy's Tetrabiblos

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