Final answer:
17 beta Estradiol is a form of estrogen, which is a key hormone for female reproductive health and is synthesized from cholesterol.
Step-by-step explanation:
The kind of estrogen referred to as 17 beta Estradiol falls within the class of estrogens, which are a group of predominantly female sex hormones. Estradiol is one of the key forms of estrogen and is pivotal for the development and maintenance of the female reproductive tissues, secondary sex characteristics, and the regulation of the menstrual cycle.
Estradiol is synthesized from cholesterol with pregnenolone acting as an intermediate during its synthesis. Once produced, it plays a crucial role in the reproductive and sexual functions, as well as overall health in females and, to a lesser extent, in males.