The Hart's Line (after David Berry Hart)is the edge of the vulval vestibule.
To its left and right are the labia minora. Anterior to it are the clitoral hood, clitoral frenulum, and the clitoral glans. Posterior to it is the posterior commisure of the labia minora and the frenulum labiorum pudendi.
The sides of the vestibule are visible as Hart’s Line on the inside of the inner lips. The line of change from vulvar skin to the smoother transitional skin of the vulva is called Hart’s Line. [1]