Great post! Very informative! I read somewhere that the babies heart valve gets closed when baby receives all the blood from the placenta then a hormone is released and bam shut switch over happens... something like that. Love learning more! Thanx for sharing!
RE: How does the heart change at birth?
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How does the heart change at birth?
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The two valves I mentioned in this article are closed by different mechanisms. The foramen ovale shuts simply due to pressure changes in the babies heart upon birth. However the ductus arteriosus is closed due to hormone involvement much like you describe. It is more a decrease in hormones as the baby is unattached from the mother that causes the shunt to close though.
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Wow! Ok! Thank you for the further explanation! Once again wonderful article!
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