What occurs in the embryonic stage of fetal development?

Maturation of germ cells in ovaries

Gender differentiation takes place

Implantation begins

Differentiation begins

Answer and Explanation

The Correct Answer is B

A. Maturation of germ cells in ovaries – Incorrect; this occurs later in fetal development and after birth.

B. Gender differentiation takes place – Correct; the embryonic stage (weeks 3-8) is when gender differentiation occurs at around week 7-8.

C. Implantation begins – Incorrect; implantation happens in the blastocyst stage (week 1-2), before the embryonic stage.

D. Differentiation begins – Incorrect; cell differentiation starts earlier, in the blastocyst stage, before full embryonic development.

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Correct Answer is ["C","E"]

Explanation

A. Quickening – Incorrect; quickening (fetal movement) is a presumptive sign of pregnancy.
B. Amenorrhea – Incorrect; absence of menstruation is a presumptive sign of pregnancy.
C. Ballottement – Correct; ballottement is a probable sign, not a presumptive sign, as it is detected by a healthcare provider.
D. Increased urination – Incorrect; frequent urination is a presumptive sign of pregnancy.
E. Positive pregnancy test via blood work – Correct; a positive pregnancy test is a probable sign, not a presumptive one.

A. Hormonal imbalances B. Chemicals C. Environmental D. Emotional stress E. Infections F. Physical trauma

Correct Answer is ["B","C","E"]

Explanation

A. Hormonal imbalances – Incorrect; while maternal hormones can impact fetal growth, they are not classified as teratogens.

B. Chemicals – Correct; drugs, alcohol, and toxins (e.g., thalidomide, lead, mercury) can cause birth defects.

C. Environmental – Correct; radiation and pollutants can affect fetal development.

D. Emotional stress – Incorrect; while stress affects pregnancy outcomes, it is not classified as a teratogen.

E. Infections – Correct; infections such as rubella, toxoplasmosis, and syphilis can cause severe congenital abnormalities.

F. Physical trauma – Incorrect; trauma can harm the fetus but is not a teratogen.

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What occurs in the embryonic stage of fetal development?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Which of the following are NOT considered presumptive signs of pregnancy? (Select all that apply.)

Correct Answer is ["C","E"]

Explanation

Developing organs and body systems are highly susceptible to teratogens, which can cause major abnormalities. These teratogens usually fall into one of three categories: (Select all that apply.)

Correct Answer is ["B","C","E"]

Explanation

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