Self-defeating personality disorder (also known as masochistic personality disorder) was a proposed personality disorder. As a descriptor for Other personality disorder it was mentioned in the DSM-III in 1980. It was discussed in an appendix of the revised third edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-III-R) in 1987, but was never formally admitted into the manual. Because of its significant overlap with other personality disorders (borderline, avoidant and dependent) the distinction was not seen as clinically valuable. It was entirely excluded from the DSM-IV. Since the DSM-5, the diagnoses other specified personality disorder and unspecified personality disorder have mostly replaced its use. Diagnosis
Definition proposed in DSM III-R for further review
Self-defeating personality disorder is:

A) A pervasive pattern of self-defeating behavior, beginning by early adulthood and present in a variety of contexts.
A choriovitelline placenta is a placenta formed by the yolk sac and chorion. In a choriovitelline placenta, the yolk sac fuses with the chorion and, subsequently, wrinkles develop that hold the embryo to the uterine wall, thus forming the choriovitelline placenta. The chorionic blood vessels are connected with the vitelline blood vessel of the yolk sac. It is a primitive type of placenta found in all marsupials. (However, bandicoots also have a chorioallantoic placenta.) A choriovitelline placenta also forms early in the development of some placental mammals before the chorioallantoic placenta forms and the choriovitelline placenta is resorbed. == References ==