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 C
Explanation
Choice A rationale
Increasing the rate of infusion of IV oxytocin in the presence of abnormal fetal heart rate decelerations is contraindicated. It may exacerbate uterine hyperstimulation, further compromising fetal oxygenation.
Choice B rationale
Decreasing the rate of infusion of the maintenance IV solution will not address the issue of uterine hyperstimulation or abnormal fetal heart rate decelerations. The focus should be on managing oxytocin administration.
Choice C rationale
Discontinuing the infusion of IV oxytocin is appropriate due to uterine tachysystole and associated fetal heart rate decelerations. This helps reduce uterine contractions and allows for fetal recovery, improving oxygenation.
Choice D rationale
Slowing the client's rate of breathing is not related to managing uterine contractions or fetal heart rate decelerations. The intervention should directly address the cause of the decelerations, which is oxytocin-induced hyperstimulation. .
Correct Answer is A
Explanation
Choice A rationale
Blood pressure should be addressed first due to the client’s elevated BP (144/92 mmHg), which is a potential sign of complications such as preeclampsia.
Choice B rationale
Pulse of 99 bpm is slightly elevated but not immediately concerning compared to the high BP.
Choice C rationale
Respirations are within normal range (17/min) and do not require immediate intervention.
Choice D rationale
Temperature of 100.4°F (38.0°C) is slightly elevated but not as critical as the high BP.