Hormones are chemical messengers produced in one part or organ of the body that run the activity of an organ, or a group of cells, in another part of the body.  Other hormones, nerve signals, or a signal from the target organ indicating a decreased need for the stimulating hormone regulates the release of hormones.

The steroid hormones look similar in their molecular structure, but their effects in the body are quite different. Their physical differences are slight and yet those differences make the difference between a man and a woman, pregnancy and infertility, fatigue and energy, pre-menopause symptoms and good health. They affect all parts of the body, including the brain, bones, circulation, digestion, liver, kidneys, nerves, muscles, reproductive organs, and the immune system.

The steroid hormones are interrelated to one another, each one being made from another, or turned back into another, depending upon the needs of the body. Progesterone, a steroid hormone, is the primary building block for all the other steroid hormones. When one of these hormones is missing or present in the wrong amount, it has a profound effect on your body. Hormonal balance is essential to good health.

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