I'm not sure what it really means but i'll
do a quick google.
This is taken from
http://www.Surebab
y.Com/pregnancy-week-35.Php
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your baby might ‘drop’ (shift into
your pelvis) before labor begins, but not
all babies drop prior to the onset of
labor. If your baby drops (this is also
called ‘lightening’ or
‘settling’), you will begin to notice
a decrease in lap space when seated, a
sudden ease of breathing and more stomach
capacity (since the load has shifted
down), more pelvic pressure, and more
frequent urination- maybe even slight
incontinence. At each prenatal visit,
your doctor will check to see if your baby
has dropped into your pelvis.
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hope that helps.