Sexual intercourse does not cause permanent enlargement of the female vagina. The size and shape of the vagina are primarily determined by its bone and muscle structure, which have certain elasticity and plasticity, but this does not mean they undergo permanent changes due to sexual activity.

The elasticity of the vagina comes from its muscle tissue, particularly smooth muscle. These muscles relax during sexual intercourse to accommodate different sizes of genitalia. This relaxation occurs through neural signals and hormonal regulation, representing a temporary physiological response rather than a permanent structural change. The connective tissue in the vaginal wall also has elasticity and restorative capabilities, allowing the vagina to return to its original size after intercourse.

During sexual intercourse, a woman's vagina undergoes physiological mechanisms to adapt to her partner's size. This includes neural signaling, hormonal regulation, and muscle relaxation—all designed to facilitate comfortable intercourse. These mechanisms are temporary, and the vagina gradually returns to its original size afterward.

【Health Tips:】

1. Maintaining good personal hygiene habits helps prevent infections and promotes reproductive system health.

2. Strengthening the pelvic floor muscles can be achieved through regular Kegel exercises.

3. Maintaining a healthy lifestyle, including a balanced diet and moderate exercise, contributes to the overall health of the reproductive system.