Newborn Development (0–1 Month): What to Expect

During the first month of life, newborns develop primitive reflexes (rooting, sucking, grasping, Moro), sleep 14–17 hours per day in 2–4 hour stretches, feed 8–12 times daily, and begin to recognize familiar voices and faces (CDC, 2022). Most newborns lose 5–10% of birth weight in the first few days and regain it by 10–14 days. The AAP recommends well-child visits at 3–5 days and again at 1 month to monitor weight gain and screen for jaundice, heart defects, and hearing.

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What reflexes does my newborn have?

Newborns arrive with a set of primitive reflexes — involuntary, hardwired responses present from birth that serve as key indicators of healthy neurological development. The five major newborn reflexes are the rooting reflex, sucking reflex, Moro (startle) reflex, palmar grasp reflex, and stepping reflex (AAP, 2022). Your pediatrician checks for all of them at newborn exams.

• Rooting reflex: When you stroke your baby's cheek, they turn toward the touch and open their mouth. This helps them find the breast or bottle for feeding.
• Sucking reflex: When something touches the roof of the baby's mouth, they begin to suck. This reflex is essential for feeding and is present before birth.
• Moro (startle) reflex: A sudden noise, movement, or sensation of falling causes the baby to throw their arms and legs outward, then pull them back in. This reflex is strongest in the first month and typically fades by 3–4 months.
• Grasp reflex: Place your finger in your newborn's palm and they will curl their fingers tightly around it. This palmar grasp reflex usually fades around 3–4 months as voluntary grasping develops.
• Stepping reflex: If you hold your baby upright with their feet touching a flat surface, they may make stepping motions. This reflex disappears around 2 months and is unrelated to walking readiness.

The presence and strength of these reflexes are important indicators of healthy neurological development. Your pediatrician assesses them as part of routine newborn exams. If a reflex seems absent or asymmetrical, bring it up at your next visit.

What can my newborn see and hear?

Newborns can see from birth, but their visual focus is limited to about 8–12 inches — the distance from your arms to your face during feeding. Hearing is well-developed at birth: newborns recognize their mother's voice from the womb, prefer it over unfamiliar voices, and startle at loud sounds (CDC, 2022). All newborns in the United States receive a hearing screening before hospital discharge, per AAP guidelines.

• Vision: Newborns are drawn to high-contrast patterns (especially the edges of faces) and prefer to look at human faces over other objects. By the end of the first month, most babies can briefly follow a slow-moving object with their eyes. Color vision develops gradually over the first few months.
• Hearing: Newborns startle at loud sounds (Moro reflex) and may turn toward familiar voices. Your baby has been hearing your voice since before birth and already finds it soothing.
• Smell and taste: Newborns have a strong sense of smell and can recognize the scent of their mother's breast milk within the first days of life. They show a preference for sweet tastes, which may encourage breastfeeding.

How often should I feed my newborn?

Breastfed newborns typically feed 8–12 times in 24 hours (roughly every 2–3 hours), including through the night. Formula-fed newborns eat 6–8 times daily, consuming about 2–3 ounces per feeding in the early weeks, gradually increasing to 4 ounces by the end of the first month (AAP, 2022). Frequent feeding is necessary because newborns have tiny stomachs and need to eat constantly to grow.

The AAP recommends exclusive breastfeeding for approximately the first 6 months, with continued breastfeeding alongside solid foods for 2 years or beyond. However, fed is the priority — the most important thing is that your baby is eating enough and gaining weight. If you have concerns about supply, latch, or intake, ask your pediatrician for a lactation referral at your first visit.

How much should my newborn sleep?

Newborns typically sleep 14–17 hours per day in short stretches of 2–4 hours around the clock (National Sleep Foundation, 2023). This is broken into many small periods rather than any consolidated block — newborns have no circadian rhythm, so there is no difference between day and night sleep in the first month. Sleep is organized entirely around feeding cycles.

The AAP's safe sleep guidelines recommend placing your baby on their back on a firm, flat surface for every sleep, room-sharing without bed-sharing for at least the first 6 months, and keeping the sleep area free of loose bedding, bumpers, and soft objects. For a full guide to newborn sleep, visit our Newborn Sleep page.

How does my newborn bond with me?

Bonding in the newborn period happens through responsive caregiving — answering your baby's cries, skin-to-skin contact, eye contact during feedings, and talking and singing. Research cited by the AAP consistently shows that responding promptly to newborn cries builds secure attachment and does not "spoil" a baby. By the end of the first month, your baby may show brief moments of alertness, locking eyes with you during feeding and turning toward your voice.

Newborns are comforted by skin-to-skin contact, the sound of a familiar voice, and gentle rocking or swaying. They communicate their needs through crying — which is their only language right now. Every time you respond to that crying, you are strengthening the neural pathways that form the foundation of your child's emotional development.