At her first prenatal visit, a woman and the nurse are discussing fetal development.The client asks, "When will we be able to hear the baby's heartbeat?" The nurse should reply, The fetal heartbeat can be heard with a Doppler at:
The fourth week of gestation.
The sixth week of gestation.
The seventh week of gestation.
The twelfth week of gestation.
The Correct Answer is D
Choice A rationale
The fetal heartbeat can be heard with a Doppler at the fourth week of gestation is incorrect. At this early stage, the embryonic heart has only just begun to form, and its activity cannot be detected by Doppler.
Choice B rationale
The fetal heartbeat can be heard with a Doppler at the sixth week of gestation is incorrect. Although the heart begins to beat around this time, it is usually too faint to be detected by Doppler.
Choice C rationale
The fetal heartbeat can be heard with a Doppler at the seventh week of gestation is incorrect. It remains challenging to detect the fetal heartbeat this early with standard Doppler equipment.
Choice D rationale
The fetal heartbeat can be heard with a Doppler at the twelfth week of gestation is correct. By the end of the first trimester, the fetal heart is sufficiently developed and strong enough to be detected using Doppler ultrasound, allowing healthcare providers to monitor fetal well-being.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["3.9"]
Explanation
Step 1 is 3900 grams ÷ 1000 = 3.9 kg
Step 2 is 25 mg/kg × 3.9 kg = 97.5 mg
Step 3 is 97.5 mg ÷ (125 mg/5 mL) = 3.9 mL
The newborn will receive 3.9 mL in 24 hours.
Correct Answer is A
Explanation
Choice A rationale
During pregnancy, there is an increase in fibrinogen and a decrease in fibrinolysis. These changes increase the risk of thromboembolic events, as they promote clot formation.
Choice B rationale
Increased blood volume and cardiac output are normal in pregnancy but do not directly increase the risk of thromboembolic events. They are adaptations to meet the increased metabolic demands.
Choice C rationale
Decreased hematocrit and increased RBC levels are typical in pregnancy but are related to the physiological dilution of blood, not thromboembolic risks.
Choice D rationale
Decreased blood pressure and hemoglobin are common in pregnancy due to increased blood volume but are not associated with increased thromboembolic risks. .
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