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A nurse in a prenatal clinic is caring for a client who is pregnant and asks the nurse for her estimated date of birth (EDB). The client's last menstrual period began on October 17. What is the client's EDB? (State the date in MMDD.
For example, October 17 is 1017)

A.

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

B.

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

C.

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

Answer and Explanation

The Correct Answer is A

 

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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Correct Answer is C

Explanation

Choice A rationale

The placenta does not provide thermoregulation; that function is managed by maternal thermoregulation and the amniotic fluid which insulates the fetus.

Choice B rationale

Amniotic fluid cushions the fetus from maternal movements, not the placenta. The placenta's role is more focused on nutrient and waste exchange.

Choice C rationale

The placenta facilitates metabolic functions and gas exchange, supplying oxygen and nutrients to the fetus while removing carbon dioxide and waste products, ensuring fetal development.

Choice D rationale

The placenta doesn't provide a sterile environment. This is accomplished by the amniotic sac and amniotic fluid. The placenta connects the fetus to maternal blood supply, ensuring necessary exchanges for fetal growth.

Correct Answer is C

Explanation

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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