Testosterone is hormone which plays an important role in stimulating and maintaining male secondary sex characteristics. It belongs to a family of hormones called androgens.
It is produced mainly by the testicles and for a small part in the adrenal gland. It influences the secondary male characteristics (body hair, deepening of the voice, sperm production and the growth of bone and muscle) and plays a crucial role in the formation of the male genitals.
Testosterone is the most important hormone when it comes to sex, both for guys and girls. It enhances sexual desire and contributes to sexual functioning. A lack of testosterone can cause erection problems, while girls with a lack of testosterone may have a diminished or no desire for sex.
The amount of testosterone in the female body is much lower than with guys, but the effect is comparable because their body is more sensitive to this hormone.
During your teens your body produces more testosterone, increasing the sebum production. This may cause acne. Girls can solve this problem by using Diane 35, a contraceptive pill with anti-androgens.