The external female reproductive organs are collectively known as the vulva or the pudendum. These structures extend from the symphysis pubis anteriorly to the perineal body posteriorly, and laterally bounded by the crural folds. Understanding this regional anatomy is fundamental for nurses conducting perineal care, assessing for trauma after childbirth, or identifying signs of infection. The visible nature of the vulva allows for direct visual inspection during physical examination, making it a primary site for early detection of dermatological conditions, cysts, and sexually transmitted infections.
The labia minora are two thin, hairless cutaneous folds located medial to the labia majora. They lack adipose tissue but possess a rich supply of blood vessels and nerve endings, making them highly sensitive. Anteriorly, each labia minora splits to form a fold over and under the clitoris, creating the prepuce and frenulum of the clitoris. Between the labia minora lies the interlabial space or vestibule, which contains several important anatomical openings.
The clitoris is a small, cylindrical, highly sensitive erectile organ homologue to the male penis. It consists of a glans, a body (corpus), and two crura that attach to the pubic bones. The primary physiological role of the clitoris is sexual arousal, housing thousands of sensory nerve endings. Unlike the male counterpart, it does not contain the urethral meatus.
The vestibule is the cleft enclosed by the labia minora containing the external openings of the urethra and the vagina. Opening into the vestibule are the Bartholin's glands (greater vestibular glands) located posteriorly on each side of the vaginal opening, which secrete mucus to lubricate the labial tissues. Skene's glands (lesser vestibular glands) open near the urethral meatus and secrete fluid during sexual arousal.
The vaginal orifice (introitus) is the opening into the vaginal canal located in the posterior part of the vestibule. It is partially closed in virgins by the hymen, a thin fold of mucous membrane. The hymen can take various shapes (annular, cribriform, septate) and typically stretches or tears during initial sexual intercourse, tampon use, or vigorous physical activity, leaving small fleshy remnants known as carunculae myrtiformes.
The external genitalia receive a rich vascular supply primarily from the internal pudendal artery, a branch of the internal iliac artery. Venous return largely parallels these arterial pathways into the internal pudendal veins. Sensory innervation is supplied by the pudendal nerve (S2-S4), which explains why a pudendal nerve block provides effective perineal anesthesia during episiotomy repair. Lymphatic drainage from the vulva flows primarily to the superficial and deep inguinal lymph nodes, an important consideration when staging vulvar malignancies or assessing infection spread.
Nurses must perform systematic vulvar assessments to identify common clinical issues such as Bartholin's gland cysts, labial edema, lacerations, or signs of female genital mutilation (FGM). Inspection requires good lighting, patient positioning in the lithotomy or modified Sims position, and clear communication to ensure patient comfort. Maintaining privacy and cultural sensitivity is paramount during any perineal examination in nursing practice.