Medical astrology is incredibly complex. However, if we focus our attention on the biological and spiritual rhythms of the chart, this difficult avenue of interpretation can be simplified. The rhythmic cycles are the Moon's biorhythms and the solar chakras, and detecting them in the chart is a key technique discussed in this book. Depletion of these rhythmic cycles is a common occurrence. Today, the incoherent effects of the biorhythms and the chakras are often overlooked; however, their cyclic influences were frequently scrutinized by our ancient spiritual ancestors. Thus, ways to help the practitioner locate these powerful rhythms via the natal chart are explained; but more importantly the book explains why rhythmic depletion contributes to the onset of illness. The Moon's Nodes are also significant influences in medical astrology. Metaphorically speaking, the North Node symbolizes the karmic contract the soul agreed to honor in order to acquire knowledge, awareness and insight, and the South Node represents the knowledge the soul has acquired throughout its previous incarnations. In addition, the planetary rulers of the Nodes manifest ways in which the soul can successfully progress through incarnation under the matriarchal influence of the Nodes. It is possible that if the soul loses its footing in life the Nodes may potentially manifest as malign; after all, doesn't illness and disease occur when an individual is beset by major life challenges stumbling at these crucial junctures? Using the Moon's Nodes, her biorhythms, the rulers of the Nodes and the solar chakras as the focal points of the natal and decumbiture chart, this book explains, through numerous examples, how to successfully diagnose illness and disease.