What are the differences between testosterone and the female version of testosterone, and how do they impact the body differently?

Testosterone is a hormone primarily found in males, while the female version of testosterone, called estrogen, is found in females. Testosterone is responsible for male characteristics like muscle mass and facial hair, while estrogen is responsible for female characteristics like breast development and menstrual cycles. These hormones impact the body differently, with testosterone promoting muscle growth and bone density in males, and estrogen regulating the menstrual cycle and supporting pregnancy in females.