The fetal period lasts from the 8th week to birth and is the longest stage. Which option correctly states this duration?

• A. The placenta forms during this period
• B. The first trimester ends at twelve weeks
• C. The fetus grows rapidly and develops further
• D. From the 8th week to birth

Answer: (D)

In prenatal development, the fetal period is the stage that follows the embryonic period and continues from about the eighth week until birth, making it the longest phase of development before birth. The statement that runs from the eighth week to birth directly captures how long this period lasts, so it’s the best fit. The other options describe things that happen earlier (like placenta formation during the embryonic period) or refer to markers of time (the end of the first trimester) or general fetal growth, but they don’t specify how long the fetal period lasts.