A baby developing in his or her mother's womb will begin developing lungs during the ________ period.

A) fetal
B) germinal
C) embryonic
D) zygotic

Fetal Period

The period in prenatal development from nine weeks after conception until birth, when the brain continues developing, bodily structures are refined, and the fetus grows in length and weight and accumulates fat in preparation for birth.

Germinal Period

The initial two weeks of prenatal development following conception, characterized by rapid cell division and attachment to the uterine wall.

Embryonic Period

The stage of prenatal development from approximately the second to the eighth week after fertilization, during which major organs and structures within the embryo begin to develop.