The diagnostic category was discussed in the DSM-IIIR (1987), in which the proposed condition was named "Late Luteal Phase Dysphoric Disorder" and was included in the appendix as a proposed diagnostic category needing further study. Preparations for the DSM-IV led to debate about whether to keep the category at all, only keep it in the appendix, or remove it entirely; the reviewers determined that the condition was still too poorly studied and defined, so it was kept in the appendix but elaborated with diagnostic criteria to aid further study.