CYP19A1, also known as aromatase, is an enzyme that enables the conversion of androgens (such as testosterone) into estrogens (such as estradiol). This enzyme plays a crucial role in estrogen biosynthesis, which is vital for sexual development, reproduction, bone metabolism, and cardiovascular health. CYP19A1 is expressed in various tissues, including the ovaries, testes, placenta, adipose tissue, and brain. In females, it primarily produces estrogen in the ovaries by converting androgens from the adrenal glands.