There were two things of interest to RLS sufferers as a man I could tell from your reference. One is the well known fact that progesterone level increases in the second half the period coupled with the less know fact that descending level of pregosterone interferes with sleep, i.e decreases the ammount of slow wave sleep (so does RLS).
Later in the month women may find it more difficult to fall asleep. This may be related to the rapidly falling levels of progesterone. Premenstrual Syndrome (PMS) symptoms may occur during the later portion of this phase (starting about days 22-28 ). The most common sleep-related problems reported by women with PMS are: insomnia (difficulty falling asleep, staying asleep, waking up too early or waking unrefreshed).
The other one is the nocturnal eating disorder which can also be caused by other sleep disorders such as... and here it mentions RLS!
Nocturnal Sleep-Related Eating Disorder
Persons with nocturnal sleep-related eating disorder (NS-RED), an uncommon condition, eat food during the night while they appear asleep. Since parts of the brain that control memory are asleep, people with NS-RED cannot remember nighttime eating.
NS-RED can occur during sleepwalking. It can be caused by medications (e.g., some drugs prescribed for depression or insomnia) or by sleep disorders (sleep apnea, restless legs syndrome) that cause awakenings and trigger sleep-eating
I wonder how many RLS patients suffer from NS-RED? Since we are missing out on the deep sleep stages, we probably would remember if we ate?
