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.
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Correct Answer is ["A","B","C","D","G"]
Explanation
Choice A: Respiratory assessment
The newborn is exhibiting signs of respiratory distress, such as mild grunting, nasal flaring, and intermittent retractions. These symptoms indicate potential respiratory issues that need immediate attention.
Choice B: Hemoglobin
The newborn's hemoglobin level is 9 g/dL, which is below the normal range of 14 to 24 g/dL2. This indicates anemia, which can affect the baby's oxygen-carrying capacity and overall health.
Choice C: Serum glucose
The newborn's serum glucose level is 38 mg/dL, which is below the normal range of 40 to 45 mg/dL2. Hypoglycemia in newborns can lead to serious complications if not addressed promptly.
Choice D: Heart rate
The newborn's heart rate is 180 beats per minute, which is above the normal range for a newborn (normal range: 120-160 beats per minute)2. This tachycardia could be a response to stress or an underlying condition that needs evaluation.
Choice G: Hematocrit
The newborn's hematocrit level is 35%, which is below the normal range of 44% to 64%2. This further supports the presence of anemia and the need for intervention2
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.