Which of the Following Events Causes Cessation of Right-To-Left Shunt

question 3

Multiple Choice

Which of the following events causes cessation of right-to-left shunt through the foramen ovale?

• A) Increased levels of PO₂ in the blood of the neonate
• B) Decreased levels of PCO₂ in the blood of the newborn
• C) Increased systemic vascular resistance
• D) Removal of the placenta, causing lowered blood volume returning to the right side of the fetal heart

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