Gynecologic and Peripartum Causes
Deposits of endometrial tissue on the proximal
nerve can cause recurrent cyclic, or catamenial,
sciatica, more often on the right side than on the
left side.14 Large ovarian cysts and uterine enlargement
associated with late pregnancy can compress
the nerve between the fetal head and the pelvic
brim (Fig. 1). It is not unusual for a woman to
have unilateral or bilateral sciatica post partum,
regardless of whether forceps were used during
delivery; sciatica ostensibly occurs after a woman
has spent a prolonged time in the lithotomy
position.