Many steels add to the iron-steel mix other metals that give the entire substance desirable properties such as strength, heat resistance, or flexibility. Steel is considered a mixture rather than a compound because the iron does not chemically bond with the carbon and other components.
Some of estrogen's effects include: 1  Increasing serotonin, and the number of serotonin receptors in the brain. 2  Modifying the production and the effects of endorphins, the feel-good chemicals in the brain. 3  Protecting nerves from damage, and possibly stimulating nerve growth.
Hormones play a vital role in every womanâs health and well-being. When hormone levels fluctuate, this can affect your mood, sexual desire, fertility and ovulation. In other words, the imbalance of hormones may impact negatively on how your reproductive system responds. Every month, the female hormones estrogen and progesterone are produced.