Premenstrual dysphoric disorder (PMDD) is a severe, sometimes disabling extension of premenstrual syndrome (PMS). Although regular PMS and PMDD both have physical and emotional symptoms, PMDD causes extreme mood shifts that can disrupt your work and damage your relationships.remenstrual dysphoric disorder (PMDD) is a severe, sometimes disabling extension of premenstrual syndrome (PMS). Although regular PMS and PMDD both have physical and emotional symptoms, PMDD causes extreme mood shifts that can disrupt your work and damage your relationships.
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An interexchange carrier (IXC) is a telephone company that provides connections between local exchange s in different geographic areas. IXCs provide inter LATA service as described in the Telecommunications Act of 1996 . IXCs include AT&T, MCI, Sprint, and others.