Two-Segment Lumbar Spine Model with Pelvis and Femur - This model clearly illustrates the L4 and L5 lumbar vertebrae, the sacrum, and the complete hip bone and femoral head, all at 1:1 scale. Removable - All bones are articulated and can be dismantled. It features transparent intervertebral discs and nerve roots. Stretchable Dynamic Design‌ – Areas such as the sacroiliac joint and the symphysis pubis are movable and stretchable, simulating the laxity of ligaments during pregnancy. During labour demonstrations, the coccyx can be moved backwards, providing a clear visual demonstration of the dynamic increase in the anteroposterior diameter of the pelvic outlet and accurately recreating the process of birth canal dilation as the foetus is delivered. Obstetrics and Gynaecology Classroom Teaching – Used to explain the anatomical composition of the female pelvis and the characteristics of the diameters across the three planes of the birth canal, helping medical students to quickly grasp the structural logic of the bony birth canal. Midwifery Delivery Demonstration – Dynamically demonstrates the morphological changes of the pelvis during labour, illustrates the complete path of the foetus through the birth canal in different foetal presentations, and supports practical training for midwives.