Fibroids Uterine Fibroids Uterine fibroids (leiomyomas) are benign smooth muscle tumors of the uterus. Fibroids frequently cause abnormal uterine bleeding and pelvic pressure and sometimes urinary or intestinal symptoms... read more 
may increase risk of
Rarely, fibroids partially obstruct the birth canal.
Preconception evaluation is recommended for women who have very large fibroids or who have fibroids and have had a spontaneous abortion.
