Principle objective of this lecture is to present on Hormones; actually Sex Hormones. Here briefly present on three Primary Hormones of Sexual Development: Estrogen, Progesterone and Testosterone. Hormones are chemical messengers that are secreted directly into the blood, which carries them to organs and tissues of the body to exert their functions. There are many types of hormones that act on different aspects of bodily functions and processes. Some of these include: Development and growth. Finally focus on Hormonal Effects.