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 C
Explanation
Choice A rationale
Syphilis can be treated with antibiotics, particularly penicillin. It is not true that there is no cure, and immunization against syphilis is not available. Proper treatment can prevent transmission to the fetus.
Choice B rationale
Changing cat litter, even with gloves, is not safe for pregnant women due to the risk of toxoplasmosis. Toxoplasmosis can cause serious complications in the fetus, and direct contact with cat feces should be avoided.
Choice C rationale
The best way to prevent CMV (cytomegalovirus) infection is through thorough and consistent hand hygiene. CMV is a common virus that can cause congenital infections, and hygiene practices are crucial for prevention.
Choice D rationale
RPR (Rapid Plasma Reagin) tests for syphilis, not rubella. A rubella vaccine would be needed if the mother is non-immune, but this would be administered post-delivery. The statement reflects a misunderstanding of the tests and vaccines.
Correct Answer is B
Explanation
Choice A rationale
Follicle Stimulating Hormone (FSH) is involved in the maturation of ovarian follicles and the menstrual cycle. While it is crucial for fertility, it is not directly responsible for maintaining pregnancy once implantation occurs.
Choice B rationale
Progesterone is essential for maintaining pregnancy. It prepares the endometrium for implantation and supports the early stages of pregnancy by preventing uterine contractions that could dislodge the embryo.
Choice C rationale
Human chorionic gonadotropin (HCG) supports the corpus luteum in early pregnancy, ensuring the continued production of progesterone and estrogen. However, implantation failure is less likely due to a lack of HCG.
Choice D rationale
Prolactin plays a role in lactation and has some influence on reproductive health, but it is not primarily responsible for implantation. A lack of prolactin is less likely to be the cause of failed implantation. .
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