[Campbell Biology P.1085] Which of the following events is characteristic of the first trimes... | Practice Question

Which of the following events is characteristic of the first trimester of human development?

  • A: The fetus typically grows to about 50 cm in length.
  • B: Fetal movements are typically visible through the abdominal wall.
  • C: The placenta completely takes over the production of progesterone.
  • D: Organogenesis, the development of major body organs, occurs.
  • E: The mother's abdominal organs become significantly compressed.

Explanation

The first trimester is characterized by organogenesis, where the major body organs develop. The text states: 'The first trimester is the main period of organogenesis, the development of the body organs'.