Which of the following correctly identifies the different phases of human development?

Select one:

a. The 1st trimester is called the embryonic development, the 2nd trimester is called the fetal development, and the 3rd trimester is when the baby grows to gain more weight.

b. The 1st trimester is fertilization and mitosis, and the 2nd and 3rd trimesters involve differentiation.

c. Weeks 1 to 8 are called the embryonic development, and weeks 9 to 39 are called the fetal development.

d. Weeks 1 to 8 are called the fetal development, and weeks 9 to 39 are called the embryonic development.

6 years ago

Answered By Yamini G

Option a is correct. First trimester of gestation includes fertilization, implantation and embryo development. Differentiation occurs and next trimester is fetal development. By the end of 2nd trimester, fetus is almost completely formed and only fetal growth occurs in the last trimester. 

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