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During preconception counseling, the nurse explains that during the first 8 weeks the fetus is most vulnerable to the effects of teratogens.
What is occurring during the first 8 weeks of gestation?

A.

Placenta formation.

B.

Fertilization.

C.

Organogenesis.

D.

Implantation.

Answer and Explanation

The Correct Answer is C

Choice A rationale

Placenta formation begins shortly after implantation, but it continues to develop throughout the first trimester and into the early second trimester, making it less precise to attribute the

first 8 weeks solely to this process.

 

Choice B rationale

Fertilization occurs within the first week after ovulation, marking the beginning of pregnancy, but it is a singular event that happens prior to the developmental processes vulnerable to teratogens.

 

Choice C rationale

Organogenesis is the critical period during which the major organs and structures of the fetus form, typically occurring between the third and eighth weeks of gestation. This is the

time when the fetus is most susceptible to the effects of teratogens, which can cause congenital anomalies.

 

Choice D rationale

Implantation occurs approximately 6-10 days after fertilization, embedding the blastocyst into the uterine lining. While crucial, it is not the primary period when teratogenic effects are

most significant, as this happens during organogenesis.

 


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View Related questions

Correct Answer is D

Explanation

Choice A rationale

Elevated WBC count is not typically associated with HELLP syndrome. HELLP syndrome involves hemolysis, elevated liver enzymes, and low platelet count.

Choice B rationale

Elevated platelet count is not a feature of HELLP syndrome. In fact, thrombocytopenia (low platelet count) is a hallmark of the condition.

Choice C rationale

Decreased BUN is not a characteristic of HELLP syndrome. The syndrome primarily affects liver function and platelets.

Choice D rationale

Elevated liver enzymes are a key diagnostic feature of HELLP syndrome, reflecting liver dysfunction and damage, which is part of the condition's pathology. .

Correct Answer is A

Explanation

Step 1 is: October 17 + 7 days = October 24.

Step 2 is: October 24 - 3 months = July 24.

Step 3 is: July 24 + 1 year = July 24. Answer: July 24 (0724)

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