Our finding that multiparous women experienced more
SUI than nulliparouswomen is similar to previous studies [6–
8]. Panayi and Khullar reported that approximately 20% of
multiparous women with SUI during the first trimester had
levator ani muscle defects on magnetic resonance imaging
compared to nulliparous women [19]. Previous pelvic floor
trauma after vaginal delivery resulting in poor support for the
urethra may explain why multiparous women have a higher
prevalence of SUI [20]. In addition, other studies [2, 21] have
reported that the course of pregnancy also plays an important