Journal of Ultrasound in Medicine : Official Journal of the American Institute of Ultrasound in Medicine, 18(1), 13-18
A previously undescribed cause of abnormal uterine bleeding is presented. Nine of 310 women evaluated by sonohysterography for abnormal bleeding demonstrated an 8 to 17 mm gap in the anterior lower uterine segment myometrium at the site of prior cesarean deliveries. All women were premenopausal and had a history of 2 to 12 days of postmenstrual spotting. Presumably a lack of coordinated muscular contractions occurs around the cesarean scar, allowing the defect to collect menstrual debris. Subsequently, the debris leaches out through the cervix for several days after the majority of menstrual flow has ceased.
Thurmond, A. S., Harvey, W. J., & Smith, S. A. (1999). Cesarean section scar as a cause of abnormal vaginal bleeding: diagnosis by sonohysterography. *Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine*, *18*(1), 13-18. https://doi.org/10.7863/jum.1999.18.1.13
Thurmond AS, Harvey WJ, Smith SA. Cesarean section scar as a cause of abnormal vaginal bleeding: diagnosis by sonohysterography. J Ultrasound Med. 1999;18(1):13-18. doi:10.7863/jum.1999.18.1.13
Thurmond, A. S., et al. "Cesarean section scar as a cause of abnormal vaginal bleeding: diagnosis by sonohysterography." *Journal of ultrasound in medicine : official journal of the American Institute of Ultrasound in Medicine*, vol. 18, no. 1, 1999, pp. 13-18.