On the other hand, a person can engage in sexual activity without an actual desire for it.Multiple factors affect human sex drive, including stress, illness, pregnancy, and others.
Although the last days of the menstrual cycle are marked by a constant testosterone level, women's libido may boost as a result of the thickening of the uterine lining which stimulates nerve endings and makes a woman feel aroused.Also, during these days, estrogen levels also decline, resulting in a decrease of natural lubrication.Sex drive can also be affected by medical conditions, medications, lifestyle and relationship issues, and age (e.g., puberty).A person who has extremely frequent or a suddenly increased sex drive may be experiencing hypersexuality, while the opposite condition is hyposexuality.Sexual desires are often an important factor in the formation and maintenance of intimate relationships in humans.
A lack or loss of sexual desire can adversely affect relationships.
In the week following ovulation, the testosterone level is the lowest and as a result women will experience less interest in sex.
Also, during the week following ovulation, progesterone levels increase, resulting in a woman experiencing difficulty achieving orgasm.
Biologically, the sex hormones and associated neurotransmitters that act upon the nucleus accumbens (primarily testosterone and dopamine, respectively) regulate libido in humans.
Social factors, such as work and family, and internal psychological factors, like personality and stress, can affect libido.
Other causes include experience of sexual abuse, assault, trauma, or neglect, body image issues and anxiety about engaging in sexual activity.