The embryo becomes a fetus at
A) the end of the first week.
B) the end of the second week.
C) the end of the eighth week.
D) the end of the second trimester.
E) the end of the third trimester.

Question

Quizplus · Accepted Answer

The embryo becomes a fetus at the end of the eighth week of pregnancy, when all major organs have formed and the fetus has a human-like appearance. Before this, it is referred to as an embryo. The second trimester of pregnancy is from weeks 13-28 and the third trimester is from weeks 29-40, so choices D and E are incorrect. Choices A and B are too early for the development of a fetus.

The Embryo Becomes a Fetus at