Which is likely to be the most critical period of fetal development and why?
A) zygote, because most of the internal organs are formed during this period
B) embryo, because most of the internal organs are formed during this period
C) fetus, because most of the internal organs are formed during this period
D) infant, because the baby is finally viable

Question

Quizplus · Accepted Answer

The embryo period is likely to be the most critical period of fetal development as most of the internal organs start to form during this period. By the end of the third week, the neural tube and brain start to develop. By the end of the fourth week, the heart starts to beat and the major organs start to form. Any disruptions during this period can result in major developmental abnormalities.

Which Is Likely to Be the Most Critical Period of Fetal