Many women experience a decreased libido for a range of reasons.
Low testosterone levels can be one reason a woman may experience decreased libido. Other causes include depression or emotional distance between sexual partners. A more obvious reason for why a woman may not desire sex is because she simply does not desire the person she is considering having sex with. Sex is both a mental and physical activity, as is often the case in the reasons for not having sex. Testosterone will work to increase a woman's sex drive, but other treatments should also be looked into because testosterone therapy has some risks.