A client, at 6 weeks gestation, arrives at the OB clinic for her initial visit and requests to hear the fetal heartbeat.
What should the nurse include in the teaching regarding cardiac development?
The fetal heartbeat can be heard via Doppler by 4 weeks of pregnancy.
The fetal heartbeat can be heard by external Doppler around 10-12 weeks of pregnancy.
You will first feel your baby move in week 24 of pregnancy.
The heart formation begins in week 5 of pregnancy and we can hear it by Doppler at 6 weeks.
The Correct Answer is B
Choice A rationale
The fetal heartbeat cannot typically be heard via Doppler as early as 4 weeks of pregnancy. At this stage, the heart is still developing, and it is too soon for external detection with a Doppler device.
Choice B rationale
The fetal heartbeat is generally detectable by an external Doppler device around 10-12 weeks of pregnancy. This is the period when the heartbeat is strong enough to be picked up by the device.
Choice C rationale
Feeling the baby move, known as "quickening," typically occurs around 18-24 weeks of pregnancy, not 6 weeks. This sensation is different from hearing the heartbeat.
Choice D rationale
While the heart begins to form around week 5, it is not detectable by Doppler at 6 weeks. The technology does not have the sensitivity to detect such an early heartbeat externally.
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Correct Answer is C
Explanation
Choice A rationale
Accelerations are increases in the fetal heart rate (FHR) above the baseline, typically in response to fetal movement or uterine contractions. They indicate a healthy, well-oxygenated
fetus and are not consistent with the described pattern of decelerations.
Choice B rationale
Late decelerations are characterized by a gradual decrease in FHR that begins after the contraction has started, with the lowest point of the deceleration (nadir) occurring after the
peak of the contraction. They are associated with uteroplacental insufficiency and fetal hypoxia, which is not described in the scenario.
Choice C rationale
Early decelerations are a gradual decrease in FHR that mirrors the contraction, starting with the contraction and returning to baseline as the contraction ends. The nadir of the
deceleration occurs at the peak of the contraction, which fits the pattern described.
Choice D rationale
Variable decelerations are abrupt decreases in FHR that can occur at any time during the contraction cycle, usually due to umbilical cord compression. They are not uniform in
relation to contractions and can vary in duration, depth, and timing, unlike the described pattern.
Correct Answer is D
Explanation
Choice A rationale
External fetal monitors are non-invasive and do not pose a risk of transmitting HIV from mother to baby. They are considered safe for monitoring fetal well-being in an HIV-positive mother.
Choice B rationale
Administering antiviral medication is essential in reducing the risk of mother-to-child transmission of HIV. It's a standard care practice for managing HIV-positive pregnant women.
Choice C rationale
Preparing for a caesarean section may be recommended to reduce the risk of vertical transmission of HIV during delivery, especially if the viral load is high.
Choice D rationale
Internal fetal scalp electrodes are contraindicated because they can create a portal for HIV transmission from mother to baby through small abrasions or punctures on the fetal scalp.