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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 ["A","B","C"]

Explanation

Choice A: Give betamethasone 12 mg IM now and repeat in 24 hr.

Rationale: Betamethasone is administered to accelerate fetal lung maturity in cases of preterm labor. Given the client's gestational age of 31 weeks, this intervention is appropriate to help reduce the risk of respiratory distress syndrome in the newborn.

Choice B: Begin loading dose of magnesium sulfate 9 g over 30 min.

Rationale: Magnesium sulfate is used for neuroprotection of the fetus in preterm labor to reduce the risk of cerebral palsy. The loading dose is typically given to achieve therapeutic levels quickly.

Choice C: Position the client in a lateral position.

Rationale: Positioning the client in a lateral position helps improve uteroplacental blood flow and can reduce the intensity of contractions, which is beneficial in managing preterm labor.

Correct Answer is C

Explanation

Choice A rationale

Irregular menses are not a direct risk factor for cervical cancer. While they can indicate hormonal imbalances, they are not strongly linked to cervical cancer risk.

Choice B rationale

Menopausal status and hormone replacement therapy (HRT) are more closely linked to breast cancer risks rather than cervical cancer. Cervical cancer is primarily associated with HPV infection.

Choice C rationale

Multiple sexual partners increase the risk of HPV infection, which is the primary cause of cervical cancer. HPV is a sexually transmitted infection that significantly raises the likelihood of developing cervical cancer.

Choice D rationale

A family history of breast cancer is more relevant to breast cancer risk rather than cervical cancer. Cervical cancer risk is more closely linked to HPV infection and sexual behavior.

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