The frequency of personality disorder is nearly three times greater in women than in men.

The frequency of Border line personality disorder (BPD) is three times greater in women than men. The disorder is characterized by a pattern of continuous instability in moods, behavior, self-image. It often affects the functioning of the patient. It occurs within the context of relationships and friendship but all in all, females have shown a staggering 3:1 ratio of acquiring the disorder. They has been a lot of hypothesis why females are more vulnerable. Some psychiatrists attribute this trend to genetic or hormonal reason while others blame BPD on early-onset incest, other sexual abuse, or Post Traumatic Stress Disorder (PTSD).