Which hormone is secreted by both the adrenal cortex and ovaries?

The hormone that is secreted by both the adrenal cortex and ovaries is estrogen. Estrogen plays a crucial role in the development and regulation of the female reproductive system and secondary sexual characteristics. In the ovaries, estrogen is primarily produced by the ovarian follicles, while the adrenal cortex produces estrogen in smaller amounts, primarily in the form of androgens that are subsequently converted to estrogen.

This dual source of estrogen production highlights its importance in both reproductive health and various physiological functions beyond reproduction, such as bone health and cardiovascular function. The body's ability to produce this hormone from different sources is part of the intricate hormonal balance necessary for maintaining reproductive and overall health.