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?
Placenta formation.
Fertilization.
Organogenesis.
Implantation.
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.
Free Nursing Test Bank
- Free Pharmacology Quiz 1
- Free Medical-Surgical Quiz 2
- Free Fundamentals Quiz 3
- Free Maternal-Newborn Quiz 4
- Free Anatomy and Physiology Quiz 5
- Free Obstetrics and Pediatrics Quiz 6
- Free Fluid and Electrolytes Quiz 7
- Free Community Health Quiz 8
- Free Promoting Health across the Lifespan Quiz 9
- Free Multidimensional Care Quiz 10
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 D
Explanation
Choice A rationale
External fetal monitors are non-invasive and do not pose a risk of transmitting HIV from mother to baby. They are considered safe for monitoring fetal well-being in an HIV-positive mother.
Choice B rationale
Administering antiviral medication is essential in reducing the risk of mother-to-child transmission of HIV. It's a standard care practice for managing HIV-positive pregnant women.
Choice C rationale
Preparing for a caesarean section may be recommended to reduce the risk of vertical transmission of HIV during delivery, especially if the viral load is high.
Choice D rationale
Internal fetal scalp electrodes are contraindicated because they can create a portal for HIV transmission from mother to baby through small abrasions or punctures on the fetal scalp.