A new mother in the postpartum unit notices that her newborn seems to turn toward her when she speaks but not when others talk.

She asks the nurse if she is imagining this.
Which response by the nurse is accurate regarding newborn sensory capabilities?

You're probably imagining it; newborns cannot distinguish between voices yet.

Your baby can already recognize and prefer your voice, which they learned to identify in the womb.

All newborns respond to any high-pitched voice the same way.

Newborns only recognize their mothers by smell, not by voice.

Answer and Explanation

The Correct Answer is B

Choice B rationale

Research into fetal development confirms that the auditory system is functional by the third trimester. A fetus hears the mother's voice regularly, as it is conducted both through the air and through the mother's body tissues and bones. Upon birth, newborns show a distinct behavioral preference for their mother's voice over that of strangers. This recognition is a vital part of early bonding and social development, allowing the infant to find comfort in a familiar stimulus.

Choice A rationale

It is incorrect to suggest that newborns cannot distinguish between voices. Numerous studies using heart rate monitoring and sucking patterns have demonstrated that infants as young as a few hours old can differentiate their mother's voice from other female voices. This ability is a result of intrauterine learning. Dismissing the mother's observation as imagination ignores established neonatal behavioral science and misses an opportunity to reinforce the importance of early maternal-infant interaction and bonding.

Choice C rationale

While it is true that newborns generally respond well to high-pitched, melodic voices often referred to as motherese, they do not respond to all such voices equally. The familiarity of the mother's specific vocal frequency and cadence, established during the prenatal period, takes precedence. A newborn might turn toward any high-pitched sound as an orienting reflex, but they demonstrate a selective preference and more sustained attention when the voice belongs to their primary biological caregiver.

Choice D rationale

Newborns do have a very keen sense of smell and can identify their mother's scent, particularly the smell of breast milk or her unique skin odors, within days of birth. However, this is not their only means of recognition. Sensory capabilities are multimodal. The auditory system is actually more developed at birth than the visual system, and voice recognition is one of the most well-documented sensory preferences in the neonatal period, occurring alongside olfactory and tactile recognition.

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Correct Answer is B

Explanation

Choice A rationale

Vitamin C, or ascorbic acid, is an essential water-soluble vitamin that supports collagen synthesis and immune function. While adequate intake is important for general maternal health and tissue repair, it is not the most critical nutritional factor for preventing specific congenital structural birth defects. Increasing vitamin C intake does not have a scientifically proven direct link to preventing major malformations during the first few weeks of embryonic development or organogenesis.

Choice B rationale

Folic acid is a B vitamin required for DNA synthesis and cell division. During the first 28 days of pregnancy, often before a woman knows she is pregnant, the neural tube closes. Adequate folic acid levels, typically 400 to 800 mcg daily, are scientifically proven to significantly reduce the risk of neural tube defects like spina bifida and anencephaly. This is the most critical preconception recommendation to ensure proper spinal cord and brain development.

Choice C rationale

Zinc is a trace element that plays a role in cellular metabolism, protein synthesis, and immune function. While some studies suggest that severe zinc deficiency might be associated with poor pregnancy outcomes or preterm labor, it is not the primary nutrient emphasized in preconception counseling for the prevention of major birth defects. Routine supplementation beyond standard prenatal vitamins is generally not the priority over folic acid for preventing early developmental malformations.

Choice D rationale

Calcium is necessary for fetal bone development and maintaining maternal bone density. While adequate calcium intake might help reduce the risk of preeclampsia or gestational hypertension in women with low baseline intake, it is not the most critical factor for preventing structural birth defects. The normal serum calcium range is 8.5 to 10.5 mg/dL. Its role is supportive of physiological maintenance rather than the prevention of early embryonic neural tube closure failures.

A. Slowly remove the breast from the baby's mouth when the infant has fallen asleep and the jaws are relaxed. B. Break the suction by inserting your finger into the corner of the infant's mouth. C. Elicit the Moro reflex to wake the baby and remove the breast when the baby cries. D. A popping sound occurs when the breast is correctly removed from the infant's mouth.

Correct Answer is B

Explanation

Choice A rationale

Relying on the infant to fall asleep and for the jaws to relax naturally is inefficient and can lead to nipple trauma. If the infant remains latched while sleeping, the continued pressure and friction against the nipple tissue can cause skin breakdown or soreness. Infants often maintain a partial suction even while asleep, so waiting for complete relaxation does not guarantee a safe or pain-free release of the delicate mammary tissue.

Choice B rationale

Inserting a clean finger into the corner of the infant mouth effectively breaks the negative pressure vacuum created during active sucking. This mechanical intervention separates the infant gums and allows air to enter the oral cavity, which instantly neutralizes the suction force. By breaking this seal before pulling the breast away, the mother prevents mechanical stretching and friction-induced damage to the nipple and areola, ensuring a safe and comfortable end to the feeding session.

Choice C rationale

Eliciting the Moro reflex is an inappropriate and stressful method to end a feeding session. This startle reflex involves a sudden extension of the arms and legs, usually in response to a perceived fall or loud noise. Using this to wake an infant and induce crying causes unnecessary physiological stress and cortisol release in the newborn. It disrupts the bonding process and does not provide a controlled or gentle way to manage the suction of the breast.

Choice D rationale

A popping sound indicates that the vacuum was broken abruptly by pulling the nipple out of the infant mouth without first neutralizing the pressure. This sound is a sign of improper technique and suggests that the nipple was subjected to significant tensile force and friction. Repeatedly allowing this popping sound to occur increases the risk of nipple cracks, bruising, and severe pain, as the delicate skin is essentially snapped away from the infant oral seal.

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A new mother in the postpartum unit notices that her newborn seems to turn toward her when she speaks but not when others talk. She asks the nurse if she is imagining this. Which response by the nurse is accurate regarding newborn sensory capabilities?

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A woman tells the nurse she is planning to become pregnant in the next few months. When providing preconception counseling, which nutritional recommendation should the nurse emphasize as most critical to prevent birth defects?

Correct Answer is B

Explanation

Before discharge from the hospital, a 20-year-old postpartum woman receives instructions about breastfeeding. The woman said that her baby boy has a good sucking reflex and that she has difficulty removing her breast from her baby's mouth. Which advice by the nurse is most appropriate?

Correct Answer is B

Explanation

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A new mother in the postpartum unit notices that her newborn seems to turn toward her when she speaks but not when others talk.

She asks the nurse if she is imagining this.
Which response by the nurse is accurate regarding newborn sensory capabilities?