Sexual dysfunction refers to a problem during any phase of the sexual response cycle that prevents the woman from experiencing satisfaction from the sexual activity. The sexual response cycle has four phases: excitement, plateau, orgasm and resolution. Many physical and/or medical conditions can cause problems with sexual function. These conditions include diabetes, heart disease, neurological disorders, hormonal imbalances, menopause, chronic diseases such as kidney or liver failure, and alcoholism and drug abuse. Many factors can contribute to a lack of desire, including hormonal changes, medical conditions and treatments, depression, pregnancy, stress and fatigue. Boredom with regular sexual routines also may contribute to a lack of enthusiasm for sex. The use of vaginal lubricants can help reduce pain caused by friction, and a warm bath before intercourse can help increase relaxation.