Like the moon's waxing and waning, or the snake which sheds its skin to be born anew, woman is a cycling creature. Both the fecundity of the moon and the snake's bondage to the changes of life through time are endemic to her nature. They are, in fact, so much a part of our make up that seldom do we stop to think about them. Yet both depend upon the almost infinitely complex multiple interactions of hormones within our bodies. In short, hormones matter a lot.
An awareness of the profound influence they exert on a woman's health and emotions - even her view of reality - is crucial. So complicated are the interactions between hormones in the human body, many are still not understood by science.
So complex are the hormonal events within the female body, and so central is their relationship to how we think and feel, that it would be no exaggeration to say the female endocrine system is an interface between body and spirit.
Even our hopes and dreams are echoed in surges of hormones and in their shifting patterns - much as chords and rhythms develop into the themes and movements of a symphony.
Changes in hormonal balance from day to day - even from moment to moment - can not only alter the way you feel emotionally; they can even affect your view of reality. Whether you see life as a challenge to be met, or a source of constant misery and disappointment, can also be reflected in hormone shifts. This is why hormonal imbalances create such emotional and spiritual agonies in women, such as those associated with PMS or menopausal symptoms.
The psychic and spiritual aspects of a woman's hormonal interactions are all too often forgotten living within the confines of the mechanistic thinking that rules our society. Instead of recognizing the changes in mood and personality as natural to any cycling creature, we tend to think we should always be the same - always rational, reliable, reasonable and steady. Meanwhile, synthetic hormones - drugs with potentially devastating side-effects - continue to be doled out to us from puberty onwards, with no respect for a woman's cycling nature, and little concern for the long term consequences these chemicals can have on our health and emotions.
There is, I believe, far too little awareness of the way in which the use of one or two artificial hormones year after year may not only undermine our long term health, but can also affect a woman's ability to fulfill her potentials for wholeness and may even impede her spiritual development.
The word hormone comes from the a Greek word, hormao, which means "I excite", and this is exactly what hormones do. They are messenger chemicals, made in minute quantities in the brain or in special endocrine glands such as the thyroid, adrenals, pancreas and ovaries - sometimes even in fat cells - and then carried by the blood stream to distant parts of the body where they control, activate and direct the ever-changing systems and organ functions, urges and feelings which are you. Your body is continually creating new hormones out of amino acids, peptides and cholesterol in the presence of certain vitamins and minerals - all in response to its specific needs.
Hormones are also continually being destroyed - that is, metabolized and removed from your system - as your need for one or another of them changes. All this happens in much the same way a theme or cadence in a piece of music gives way to the next. So rapidly can hormonal shifts take place, and so closely interwoven is the endocrine system with your thoughts, feelings and external events, that measurements of oestrogen or progesterone levels can differ drastically when taken only an hour apart.
Hormones perform many tasks. Some help produce or store energy; some trigger growth, or balance blood sugar; some affect your water balance; others your metabolic rate. Still others regulate respiration, cell metabolism or neural activity. Classified by their chemical structure, hormones can be either polypeptides or proteins, phenol derivatives or steroids. The steroid hormones - from the oestrogens and progesterone to DHEA, cortisol, aldosterone and others - that are nature's servants for regulating sex and reproduction, as well as for balancing brain chemistry and helping the body handle stress without succumbing to illness. Although they are only produced in small doses, steroids pack a big wallop. Each is highly specific in its actions. Each hormone will only excite the particular cells it is designed to affect. How this happens is one of nature's most clever tricks. A molecule of a certain hormone - take progesterone or DHEA - has a unique shape. It will be ignored by all receptor molecules - key-holes on the cells - as it travels through your body, until it is at last recognized by the particular receptor molecule with which it is meant to connect. Into this receptor site in cells, and into it alone, the hormone molecule fits perfectly - just the way a key does in its lock.
So powerful are a hormone's actions that your body only needs to make minute quantities of each as they are required. For instance, at any moment there may be as little as one molecule of a particular hormone to every fifty thousand million other molecules in your bloodstream. The body's production of hormones, and the way in which the relationship between them is continuously adjusted, relies on complex interactions involving your pituitary (a tiny gland at the base of your brain) and your hypothalamus, often called the master gland, as well as other glands such as the adrenals. In addition to producing sex related hormones such as the oestrogens, the adrenals manufacture other important steroids including cortisol and aldosterone. Cortisol's main function is looking after blood sugar levels on which energy depends, while aldosterone oversees potassium and magnesium excretion as well as sodium retention, and influences both blood pressure and fluid retention.
It is how you live during the menstrual years - the way you eat, how you use your body, and the decisions you make about what medications you take or don't take - that the stage is set for a trouble-free life, and when the time arrives, for a natural menopause.