The first days and weeks after conception (the germinal and embryonic periods) are _____ for body formation, but the entire fetal period is a _____ period for brain development.

Question

Quizplus · Accepted Answer

The germinal and embryonic periods are important for the initial formation of the body, but the fetal period (which lasts from week 9 until birth) is especially critical for brain development. This period is characterized by significant brain growth and maturation, including the formation of new neural connections and the development of specialized brain structures. While the entire prenatal period is sensitive to environmental influences, such as exposure to toxins or stress, the fetal period is particularly sensitive to factors that can impact brain development. Thus, the best choice is D, which describes the fetal period as a critical period for brain development.

The First Days and Weeks After Conception (The Germinal and Embryonic