Simulation of the Childbirth Process in LS-DYNA.

Area of Science:

• Biomechanics
• Computational modeling
• Obstetrics

Background:

• Childbirth is a biomechanical process involving uterine forces and pelvic resistance.
• Existing models often focus on either uterine or pelvic structures, not both.
• A comprehensive model is needed to understand the interplay between these structures during labor.

Purpose of the Study:

• To develop and validate a finite element method (FEM) model simulating the entire childbirth process.
• To integrate uterine biomechanics and pelvic resistance within a single computational framework.
• To provide a tool for investigating labor pathomechanics and related complications.

Main Methods:

• Developed an FEM model in LS-DYNA incorporating uterus, pelvic floor muscles, and bony pelvis.
• Modeled uterine contraction using contractile fiber elements (Hill material model).
• Simulated three cycles of uterine contraction and validated model outputs against labor data.

Main Results:

• Successfully simulated fetal delivery dynamics, including stress distribution and pelvic floor muscle response.
• Validated model outputs against key labor parameters like duration and fetal movement.
• Demonstrated the model's capability to analyze biomechanical forces during childbirth.

Conclusions:

• The developed FEM model provides a comprehensive simulation of childbirth.
• This integrated approach allows for the investigation of labor pathomechanics.
• The model has potential applications in understanding pelvic floor disorders and brachial plexus injury.