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 A
Explanation
Choice A rationale
Iron needs significantly increase during pregnancy to support the increased blood volume, the formation of the placenta, and the growth of the fetus. Pregnant women often require additional iron to prevent anemia and ensure adequate oxygen transport to the baby.
Choice B rationale
While calcium requirements do increase during breastfeeding to support milk production, this statement is not directly related to the nutritional needs during pregnancy. The focus during pregnancy should be on adequate intake of nutrients that support both maternal and fetal health.
Choice C rationale
Vitamin E requirements do not decline during pregnancy. In fact, the need for antioxidants like vitamin E may increase to protect both the mother and developing fetus from oxidative stress.
Choice D rationale
While prenatal vitamins are important for meeting various nutritional needs during pregnancy, they do not always provide sufficient vitamin D. Some women may need additional supplementation based on their dietary intake, sun exposure, and individual health needs.
Correct Answer is C
Explanation
Choice A rationale
Chromosomal defects are typically assessed using different tests, such as chorionic villus sampling or amniocentesis, rather than an ultrasound at this early stage.
Choice B rationale
Fetal lung maturity cannot be assessed at 9 weeks gestation because the lungs are not yet developed. This assessment is usually done later in pregnancy if preterm delivery is anticipated.
Choice C rationale
At 9 weeks gestation, the primary purpose of an ultrasound is to confirm the presence of a fetal heartbeat, which indicates a viable pregnancy.
Choice D rationale
The position of the fetus in utero is not a concern at this early stage of pregnancy. Fetal positioning becomes relevant later in pregnancy, closer to delivery.
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