system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Transverse vaginal septum corresponds to:
assistant
The correct answer is  If there is a disorder in fusion of downgrowing Mullerian duct and upgrowing derivative of urogenital sinus, it results in transverse vaginal septum which causes imperforate vagina (or vaginal agenesis).
In a series reported:
• 46% septa were located in upper part.
• 40% septa were located in middle part.
• 14% septa were located in lower part.
The upper part corresponds to external os, therefore it is the option of choice. For further details on transverse vaginal septum see the preceding text.