Identify the trimester when each fetal development finding occurs.
Select the appropriate trimester for each finding:
Formation of fingers, toes, and facial features
Fetus can hear and respond to external stimuli
Increase in body fat reserves
Brain develops most rapidly during this time
Gender can be determined
The Correct Answer is {"A":{"answers":"A"},"B":{"answers":"B"},"C":{"answers":"C"},"D":{"answers":"C"},"E":{"answers":"B"}}
A. Formation of fingers, toes, and facial features
Correct Trimester: 1st Trimester (Conception – 13 weeks)
Explanation:
By the end of the 1st trimester, organogenesis (organ formation) is largely complete.
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Weeks 7–8: Limb buds appear and begin differentiating into arms and legs.
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Weeks 9–12: Fingers, toes, facial features (eyes, nose, lips, ears) become clearly defined.
This is a critical period for congenital malformations if exposed to teratogens.
B. Fetus can hear and respond to external stimuli
Correct Trimester: 2nd Trimester (14–26 weeks)
Explanation:
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Around 18–20 weeks: The fetus develops the ability to hear sounds.
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External sounds can startle the fetus, and the heartbeat may change in response.
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Mother's voice and music can be recognized at this stage.
C. Increase in body fat reserves
Correct Trimester: 3rd Trimester (27–40 weeks)
Explanation:
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In the final trimester, especially after week 32, fat accumulates under the skin.
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This provides energy and helps with temperature regulation after birth.
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The fetus also gains the most weight during this period.
D. Brain develops most rapidly during this time
Correct Trimester: 3rd Trimester (27–40 weeks)
Explanation:
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Although brain development starts early, the most rapid growth occurs in the third trimester.
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There's a dramatic increase in brain volume, cortical folding, and neural connectivity.
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This trimester is essential for cognitive and motor development.
E. Gender can be determined
Correct Trimester: 2nd Trimester (14–26 weeks)
Explanation:
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By week 18–20, an ultrasound can reliably show external genitalia.
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The sex organs begin forming in the 1st trimester, but become distinct and visible by the 2nd trimester.
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This is when many parents find out the baby's gender via an anatomy scan.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Removing a pacifier does not align with preventing SIDS. Studies suggest pacifier use during sleep reduces the risk of SIDS by maintaining airway patency and ensuring better sleep quality, though it should be used appropriately without attaching strings or clips that may pose risks.
Choice B rationale
Feeding every 2 hours does not directly prevent SIDS but supports adequate nutrition for growth and development. While proper feeding schedules are important, specific sleeping arrangements and environment management play a more significant role in reducing SIDS risk.
Choice C rationale
Placing the newborn on their back to sleep aligns with safe sleep recommendations to prevent SIDS. This position reduces the risk of airway obstruction and promotes proper breathing. The supine sleep position is widely endorsed by health organizations for its protective effect.
Choice D rationale
Draping a blanket over the newborn increases the risk of suffocation and overheating, both of which are associated with SIDS. It is essential to keep sleep environments free of loose items and ensure the baby is dressed appropriately for the room's temperature to reduce these risks.
Correct Answer is C
Explanation
Choice A rationale
Performing a sterile vaginal exam assesses cervical dilation and effacement, which is essential for labor progression. However, it poses an infection risk after membrane rupture and should follow fetal heart rate evaluation to ensure fetal well-being.
Choice B rationale
Establishing IV access is important for administering fluids or medications. Still, it is not immediately necessary without first assessing the fetal and maternal condition, which dictates further intervention needs.
Choice C rationale
Obtaining the fetal heart rate is the priority after membrane rupture and bloody show. It evaluates fetal oxygenation and well-being, especially with frequent contractions. Tachycardia or decelerations may indicate distress, necessitating immediate intervention.
Choice D rationale
Assessing maternal vital signs provides insight into hemodynamic status but is secondary to immediate fetal monitoring. Fetal heart rate assessment directs urgent management, especially in high-risk scenarios like ruptured membranes and bloody show. .
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