Education Committee NASPAG Committee Opinion| Volume 27, ISSUE 6, P386-395, December 2014

Non-Obstructive Müllerian Anomalies



      The nonobstructive group of anatomic variants involving the reproductive tract includes vaginal agenesis as well as the congenital anomalies of the vagina and uterus, occurring without pain during the pubertal years.


      The objective is to discuss the non-obstructive morphologic variations in anatomy of the uterus and vagina.


      Systematic review using the GRADE system.


      These congenital anomalies are not associated with abnormalities of the external genitalia and therefore may be missed on routine physical examination. When these anomalies do cause symptoms they may be as minor as difficulty with menstrual hygiene or more significant such as primary amenorrhea, dyspareunia, recurrent pregnancy loss, and reproductive complications.


      Women with non-obstructive reproductive tract anomalies present at various ages due to the asymptomatic nature or late symptom onset of certain conditions. An MRI is the gold standard in evaluation of such conditions to aid in confirming the müllerian variant. Each condition requires careful counseling because obstetric and gynecologic risks and consequences may differ. Treatment is individualized in cases of uterovaginal agenesis with both nonsurgical and surgical options available for neovagina creation. In cases of uterine or vaginal septae, the treatment timing may vary depending on patient history. Finally, in cases of non-obstructive communicating uterine horns, the risk of ectopic pregnancy is high in the remnant horn. Should a pregnancy occur in this small underdeveloped horn, therefore, excision is recommended.

      Key Words

      Level of Evidence

      Grading of recommendations

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