North American Registry of Midwives (NARM) Practice Exam

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What is the estimated gestational week when brain growth reaches its peak?

28 weeks
32 weeks
36 weeks
40 weeks

The correct answer is: 28 weeks

The estimation that brain growth reaches its peak around 28 weeks of gestation is supported by neurodevelopmental research confirming that significant brain development occurs during this period. By this gestational age, critical processes like the formation of neural connections and the development of brain structures are highly active. During the third trimester, there is a rapid increase in both brain volume and connectivity, which influences cognitive functions and prepares the fetus for postnatal life. Notably, the majority of the brain's growth occurs in specific spurts, and reaching the peak at around 28 weeks highlights the intensive period of maturation before birth. While brain development continues beyond this point, this specific timeframe is crucial in forming the foundational aspects of brain function and development. Thus, 28 weeks is recognized as a significant milestone in fetal brain growth.