What are hormone cycles?
During the first half of a woman’s monthly cycle her body is prepared for accepting a fertilized egg. As estrogen levels increase during the first half of the cycle, water and nutrient storage takes place. At this point, progesterone begins to become the dominant hormone for the second half of the cycle. If fertilization occurs, progesterone levels increase to very high levels for several months. If fertilization does not occur, levels of both estrogen and progesterone lessen, but progesterone remains dominant.