The labia majora are a noticeable pair of skin folds that are cutaneous and serve as the lateral and longitudinal edges of the vulval clefts. They create the folds that protect the clitoris, labia minora, vulva vestibule, Bartholin’s glands, vestibular bulbs, Skene’s glands, vaginal entrance, and urethra.
Directly underneath the mons pubis, the anterior labial commissure is formed by the convergence of the anterior section of the labia majora folds. The posterior labial commissure is formed by joining the posterior labia majora. During sexual stimulation, the labia majora becomes engorged with blood and looks edematous.
Labia majora originate embryologically from the labioscrotal folds. This suggests that they develop in the female foetus from the same formerly sexually undivided anatomical feature as the male scrotum, a skin pocket located behind the penis.
Each labium majus has two layers: an outer layer coloured and covered with dense pubic hair and an inner layer smooth, filled with enormous sebaceous follicles. Squamous epithelium lines the labia majora. There is a lot of areolar tissue between the two, along with fat, a tissue corresponding to the dartos tunic of the scrotum, nerves, veins, and glands.
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