ABSTRACT
The authors have studied seventeen fetuses which were stillborn as a result of late abortion or premature labour due to cervical incompetence. The authors examined the theory that suggests that the vagina is developed from the urogenital sinus and Mullerian duct. That theory holds that it is failure of canalization of the junction of the sinus and the duct that causes transverse septum formation in the vagina. According to the authors of this paper this theory does not explain how septum are formed at different places in the vagina and how it is transverse septa are not formed in the uterus. This study allows them to suggest that the vagina itself is formed by a plaque which is entirely originally from the sinus, and that it is because of a failure of this plaque to break down completely leaving behind vestigial shreds to cause these septa to appear in the vagina.