It is always important to educate yourself about sex hormones. If you are still having questions after reading this page, visit my Sex Hormones 101 Page to learn more about sex hormones and their effects. How many times have you heard someone refer to "hormones"? In the beginning, it was thought that hormones were just a special form of sex. But, hormones are just another type of chemical substance. Chemicals are made from elements and other substances. Some chemicals, like sex hormones, are made when a specific element or chemical substance is used. For example, the hormones in some birth control pills are made when an ingredient called estrogen is taken. In the beginning, there was no need to call a chemical substance "hormones" because we did not know that it was made from one particular chemical element. Many people think that all chemicals, including sex hormones, come from one specific chemical element, such as carbon. The way we know this is by looking at the structure of the hormones, as you can see. Chemicals can be made in the same way, by combining two or more chemical elements. For example, the first chemical that was used to make birth control pills, estrogen, was synthesized from a group of elements called the boron and nitrogen family.