Overall role of umbilical cord structure in feto-maternal heat exchange

Fetal thermoregulation is immature; the fetus cannot sweat or shiver and relies on heat exchange through the feto-placental circulation to maintain temperature. Maternal hyperthermia can overwhelm this limited capacity, leading to adverse outcomes.

Prior work has suggested that umbilical coiling influences thermal regulation, but the comprehensive impact of cord geometry—including vessel coiling and configuration—on feto-maternal heat exchange has not been firmly established. This paper develops a diffusion-uptake model to examine solute and heat exchange in the cord and finds that coiling enhances shunting while typical human configurations tend to minimize heat exchange; nonetheless, the authors explicitly state that the global role of cord structure in heat exchange remains unresolved.