Using attached art as anatomical reference: Professional 3D medical animation of natural childbirth. Lateral cross-section view of female pelvis. Fetal head descends smoothly through birth canal, performing slow internal rotation per cardinal movements of labor. Slow motion at crowning to highlight final head emergence. Simultaneously show pelvic physiotherapy biomechanics: proximal femur internal rotation synchronized with pelvic outlet widening. Gluteal muscles semi-transparent revealing femoral head rotation in hip joint. Smooth, anatomical, educational motion like medical training video. Soft cinematic medical lighting. Neutral studio background. Stable lateral camera with subtle slow zoom. Add subtle arrows for internal hip rotation and outlet widening. Realistic medical 3D style, high anatomical accuracy, semi-transparent muscles, clear bones/joints. Duration: 12 seconds. No audio.
