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Question: 1 / 400

By the end of which week of gestation is the cardiovascular system of the newborn fully developed?

Fifth week

Sixth week

Seventh week

Eighth week

By the end of the eighth week of gestation, the cardiovascular system of the newborn is considered to be fully developed. During this critical period of development, the heart undergoes a series of complex morphological changes, including the formation of four distinct chambers and the establishment of major vascular connections to the lungs and the rest of the body.

By the end of week eight, the fetal heart has typically reached a level of maturation that allows it to function effectively postnatally. Prior to this, although the heart may begin to develop and show some basic functionality, it does not have the full structural integrity and efficiency necessary for sustaining life outside the womb. Therefore, recognizing the eighth week as the timeline for the completion of cardiovascular development is crucial for understanding fetal growth and preparing for care immediately after birth.

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