Women’s sexual desires naturally fluctuate over the years. Highs and lows commonly coincide with the beginning or end of a relationship or with major life changes, such as pregnancy, menopause or illness. Some medications used for mood disorders also can cause low sex drive in women. The medical term for low libido and lack of interest in sex is Hypoactive Sexual Desire Disorder (HSDD), though there is some debate as to whether or not a woman’s lack of sex drive should be viewed as a disorder. In fact, research has found that the female libido differs from that of men and that women naturally have a lower libido and think about sex less often than men.