A Dynamical Systems Model of Intrauterine Fetal Growth

Area of Science:

• Maternal-fetal medicine
• Dynamical systems modeling
• Developmental biology

Background:

• Mechanisms linking maternal obesity, intrauterine environment, and fetal development remain unclear.
• Understanding these factors is crucial for optimizing fetal growth and birth outcomes.
• Gestational weight management interventions are vital for obese/overweight pregnant women.

Purpose of the Study:

• To develop a comprehensive dynamical systems model of fetal growth.
• To illustrate how maternal energy balance (intake, activity) influences fetal components over time.
• To predict fetal weight gain and birth weight using maternal factors.

Main Methods:

• Utilized energy balance concepts to construct a dynamical systems model.
• Estimated model parameters using intensive fetal weight and placental volume measurements.
• Data sourced from the Healthy Mom Zone (HMZ) intervention study.

Main Results:

• Developed a parsimonious system of equations for fetal growth prediction.
• The model reliably predicts fetal weight gain and birth weight.
• Model demonstrates how maternal factors influence fetal weight, fat mass, fat-free mass, and placental volume.

Conclusions:

• The dynamical systems model provides insights into maternal-fetal growth interactions.
• This model can inform clinical recommendations for managing gestational weight gain.
• Findings support the potential of adaptive interventions like HMZ to improve fetal development and birth outcomes.