What accumulates if the umbilical cord is obstructed before birth?

When the umbilical cord is obstructed before birth, there is an interruption in the normal exchange of gases and nutrients between the mother and the fetus. This leads to a decrease in oxygen supply and a buildup of carbon dioxide as well as metabolic byproducts such as lactic acid.

The obstruction prevents adequate oxygen transfer to the fetus, resulting in hypoxia. As a consequence, anaerobic metabolism can occur, which produces lactic acid. Similarly, carbon dioxide accumulates due to the reduced ability to expel it from the fetal circulation, leading to an increase in acidity within the blood, which is reflected in elevated levels of carbonic acid.

The vital physiological processes depend on the removal of carbon dioxide and the supply of oxygen; obstruction disrupts this balance, ultimately resulting in the accumulation of these harmful substances. Understanding this process is crucial for recognizing the implications of cord obstruction and how it can impact fetal development and health during the prenatal period.