A. In the majority of menstrual cycles, at least five symptoms must be present in the final
week before the onset of menses, start to improve  within a few days after the onset of
menses, and become minimal  or absent in the week postmenses.
B. One (or more) of the following symptoms must be present:
1. Marked affective lability (e.g., mood swings; feeling suddenly sad or tearful, or in-
creased sensitivity to rejection).