Newborn Examination: Tests and Checks After Birth

What Is the Newborn Physical Examination?

The newborn physical examination is a systematic series of checks and assessments performed on every baby after birth. It includes the immediate Apgar score, a comprehensive head-to-toe physical exam within the first 72 hours, reflex testing, and screening tests for metabolic and genetic conditions. These examinations are standard practice worldwide and aim to identify any health issues early.

Every baby born in a hospital or birthing center undergoes a series of examinations designed to assess their overall health and detect any potential problems as early as possible. These examinations have been developed over decades of medical research and are recommended by the World Health Organization (WHO), the American Academy of Pediatrics (AAP), and other leading medical bodies around the world.

The purpose of the newborn examination is not only to identify conditions that require immediate medical attention, but also to provide parents with important information about their baby's health. Healthcare professionals use these assessments to establish a baseline for the baby's development and to plan any follow-up care that may be needed. The vast majority of newborns pass all examinations with no concerns, which provides valuable reassurance for new parents during an often anxious time.

The examinations are conducted by trained healthcare professionals, including midwives, pediatricians, and neonatal nurses. They are performed gently and with care, and parents are encouraged to be present and involved throughout the process. Understanding what each examination involves can help parents feel more prepared and less anxious about the checks their baby will undergo.

When Are the Examinations Performed?

The timing of newborn examinations follows a carefully planned schedule. The initial Apgar assessment takes place immediately after birth, within the first few minutes of life. A more detailed physical examination is usually conducted within the first 24 to 72 hours. Additional screening tests, such as hearing screening and the newborn blood spot test (heel prick), are typically completed before the baby is discharged from the hospital, usually within the first 2 to 5 days of life.

For babies born at home, the attending midwife performs the initial assessments, and arrangements are made for the baby to receive additional screening tests within the recommended timeframe. A follow-up examination by a pediatrician or family doctor is generally recommended within the first 1 to 2 weeks of life, with another comprehensive check at 6 to 8 weeks of age.

What Is the Apgar Score and How Does It Work?

The Apgar score is a rapid assessment performed at 1 and 5 minutes after birth that evaluates five key indicators: heart rate, breathing effort, muscle tone, reflex response, and skin color. Each is scored 0 to 2, giving a maximum total of 10. A score of 7-10 is normal, 4-6 may require some intervention, and below 4 indicates the baby needs immediate medical attention.

The Apgar score was developed by Dr. Virginia Apgar, an anesthesiologist, in 1952, and it remains one of the most widely used newborn assessments in the world. The name also serves as a helpful mnemonic: Appearance (skin color), Pulse (heart rate), Grimace (reflex response), Activity (muscle tone), and Respiration (breathing effort). This scoring system provides healthcare providers with a quick, standardized way to evaluate how well a newborn is transitioning from life inside the womb to the outside world.

The assessment is performed by the attending midwife or doctor while the baby is ideally being held skin-to-skin with the mother, minimizing disruption to early bonding. The 1-minute score reflects how the baby tolerated the birth process, while the 5-minute score indicates how well the baby is adapting to the new environment. In some cases, particularly if the initial scores are low, the assessment may be repeated at 10, 15, and 20 minutes to monitor the baby's progress.

It is important for parents to understand that the Apgar score is a snapshot assessment of the baby's condition at specific moments after birth. It is not a predictor of long-term health or development. A baby who initially scores lower may quickly improve with simple interventions such as gentle stimulation, clearing the airways, or providing warmth. Research published in the journal Pediatrics has confirmed that while the Apgar score is valuable for guiding immediate care decisions, it should not be used alone to predict neurological outcomes.

What Measurements Are Taken at Birth?

At birth, healthcare providers record three key measurements: birth weight (average 2,500-4,000 g or 5.5-8.8 lbs), length (average 48-52 cm or 19-20.5 inches), and head circumference (average 33-36 cm or 13-14 inches). These measurements are plotted on growth charts to ensure the baby falls within a healthy range and serve as a baseline for monitoring future growth.

Measuring and weighing a newborn is one of the first things that happens after birth, typically within the first hour or two of life. These measurements are important not just as a record of birth size, but as critical reference points that healthcare providers will use to track the baby's growth over the coming weeks, months, and years. Modern growth charts, developed by the WHO and national health organizations, take into account factors such as gestational age, sex, and ethnicity to provide the most accurate assessment of whether a baby's size is appropriate.

Birth weight is perhaps the most commonly discussed measurement. A healthy full-term baby typically weighs between 2,500 grams (5 pounds 8 ounces) and 4,000 grams (8 pounds 13 ounces). Babies who weigh less than 2,500 grams are classified as low birth weight, while those over 4,000 grams are considered large for gestational age. Both extremes may warrant additional monitoring, though many babies at either end of the spectrum are perfectly healthy.

Head circumference is measured by wrapping a flexible measuring tape around the widest part of the baby's head, just above the eyebrows and ears. This measurement is important because it provides an indirect indicator of brain growth. The average head circumference at birth is approximately 33 to 36 centimeters (13 to 14 inches). Healthcare providers track this measurement at subsequent visits to ensure the head is growing at an appropriate rate, which is a key indicator of healthy neurological development.

Length is measured from the top of the head to the heel of the foot while the baby is lying flat. Newborns can be difficult to measure accurately because they tend to curl up, but the average full-term baby measures approximately 48 to 52 centimeters (19 to 20.5 inches). Like weight and head circumference, length is tracked over time to monitor growth patterns.

Normal Weight Loss After Birth

It is completely normal and expected for newborns to lose weight in the first few days after birth. Most babies lose between 5% and 7% of their birth weight, and losses of up to 10% can still fall within the normal range. This weight loss occurs primarily because babies are born with extra fluid that they naturally shed, and because it takes time for breastfeeding to become fully established and for the mother's milk supply to come in fully.

Healthcare providers monitor weight loss carefully during the first few days. Most babies reach their lowest weight around day 3 to 4 and begin gaining weight from day 5 onward. The vast majority of newborns regain their birth weight within 10 to 14 days. If a baby loses more than 10% of birth weight, or is not regaining weight as expected, healthcare providers will assess feeding and may suggest additional support such as lactation consultation or supplemental feeding.

What Does the Head-to-Toe Examination Include?

The head-to-toe examination is a systematic physical assessment covering the baby's entire body. Healthcare providers check the fontanelles (soft spots), eyes, ears, mouth (including palate), heart sounds, lung sounds, abdomen (liver, spleen, kidneys), genitalia, hips (for developmental dysplasia), spine, skin, and extremities. This examination typically takes 10-15 minutes and is performed within the first 72 hours of life.

The comprehensive head-to-toe examination is one of the most important assessments a newborn receives. It is a thorough, systematic check of every part of the baby's body, performed by a trained healthcare professional such as a pediatrician, neonatologist, or specially trained midwife. During this examination, the healthcare provider uses their hands, eyes, ears (with a stethoscope), and clinical judgment to assess the baby's overall health and identify any conditions that may need further investigation or treatment.

The examination is usually performed in a warm, well-lit environment with the baby undressed. Parents are encouraged to be present and can help comfort the baby during the process. The healthcare provider will typically explain what they are checking and what they find as they go along, which is an excellent opportunity for parents to ask questions about their baby's health.

While the specific order may vary between practitioners, the examination generally follows a systematic approach from the top of the head to the tips of the toes. Each area is carefully inspected, and any findings are documented in the baby's medical record. It is worth noting that many variations in a newborn's appearance are completely normal, and the healthcare provider will distinguish between normal findings and those that require further attention.

Head and Fontanelles

The healthcare provider examines the shape and size of the baby's head, checking the fontanelles (soft spots). Newborns have two main fontanelles: the anterior fontanelle at the top of the head, which is diamond-shaped and typically measures 1 to 3 centimeters across, and the smaller posterior fontanelle at the back of the head. The fontanelles allow the skull bones to overlap during birth, which is why many babies are born with a slightly elongated or misshapen head. This is called molding and typically resolves within a few days to weeks.

The provider also checks for caput succedaneum (swelling of the scalp caused by pressure during delivery) and cephalohematoma (a collection of blood between the skull bone and its covering). Both conditions are relatively common after vaginal delivery and resolve on their own, though cephalohematoma may take several weeks to flatten completely. The suture lines between the skull bones are also assessed to ensure they are not fused prematurely, a condition known as craniosynostosis.

Eyes, Ears, and Mouth

The eyes are examined for clarity and the presence of the red reflex, which is the reddish-orange reflection seen when a light is shone into the eye. The red reflex test is important because an absent or abnormal reflex can indicate conditions such as congenital cataracts or, rarely, retinoblastoma. The provider also checks for eye discharge, which can sometimes indicate a blocked tear duct or infection.

The ears are checked for their shape, position, and the presence of any skin tags or pits. The position of the ears relative to the eyes can sometimes provide clues about certain genetic conditions. The ear canals are also examined to ensure they are open. Inside the mouth, the provider checks the palate (roof of the mouth) by feeling with a gloved finger to ensure it is complete and there is no cleft palate. The tongue is assessed for tongue-tie (ankyloglossia), which can sometimes affect breastfeeding.

Heart and Lungs

Listening to the baby's heart and lungs with a stethoscope is a critical part of the examination. The healthcare provider listens for the rate, rhythm, and quality of the heart sounds. A normal newborn heart rate is between 120 and 160 beats per minute. Heart murmurs are relatively common in newborns and are heard in up to 1-2% of babies during the first examination. While many murmurs are innocent and resolve as the heart's circulation transitions from fetal to newborn pattern, some may indicate congenital heart defects that require further investigation with echocardiography.

The lungs are assessed by listening for clear, equal breath sounds on both sides of the chest. The provider observes the baby's breathing pattern, looking for signs of respiratory distress such as rapid breathing (tachypnea), grunting, flaring of the nostrils, or retractions (visible pulling in of the chest wall with each breath). A normal respiratory rate for a newborn is 30 to 60 breaths per minute.

Abdomen and Umbilical Cord

The abdomen is gently palpated (felt) to check the size and position of the liver, spleen, and kidneys. The healthcare provider checks for any masses or abnormalities. The umbilical cord stump is examined to ensure it has been properly clamped and that there are no signs of infection such as redness, swelling, or discharge. The cord stump typically dries and falls off naturally within 7 to 21 days after birth.

The provider also checks that the baby has passed meconium (the first bowel movement), which is a dark, tarry substance that typically passes within the first 24 to 48 hours of life. Failure to pass meconium within this timeframe may indicate a bowel obstruction and warrants further investigation.

Hips

Hip examination is a particularly important part of the newborn check. The healthcare provider performs specific maneuvers known as the Barlow test and the Ortolani test to check for developmental dysplasia of the hip (DDH). During these tests, the provider gently moves each hip through a range of movements to detect any instability, clicking, or clunking that might suggest the hip joint is not properly formed.

DDH is estimated to affect approximately 1 to 3 per 1,000 births, with higher rates in girls, babies born in breech position, and those with a family history of the condition. Early detection is crucial because DDH is much easier to treat in infancy, often with a simple harness worn for several weeks, compared to the more complex surgical procedures that may be needed if the condition is diagnosed later. If there are concerns about the hips, an ultrasound examination is typically arranged within the first few weeks of life.

Genitalia and Spine

The genitalia are examined to ensure normal development. In boys, the provider checks that both testicles have descended into the scrotum and examines the penis, checking the position of the urethral opening. In girls, the external genitalia are inspected for normal anatomy. It is common for newborn girls to have a small amount of vaginal discharge or even slight bleeding, which is caused by maternal hormones and is completely harmless.

The spine is examined by running a finger down the length of the baby's back to check for any irregularities in the vertebrae, dimples, tufts of hair, or skin changes over the lower spine that could indicate underlying spinal abnormalities. The anus is checked to ensure it is properly positioned and open.

What Reflexes Are Checked in a Newborn?

Healthcare providers assess several primitive reflexes in newborns, including the Moro (startle) reflex, rooting reflex, sucking reflex, palmar grasp reflex, stepping reflex, and Babinski reflex. These reflexes are present at birth and indicate normal neurological development. They gradually disappear during the first year as the baby's nervous system matures.

Primitive reflexes are involuntary movements that are present in healthy newborns as a result of normal nervous system development. These reflexes serve important survival functions in early life and their presence indicates that the baby's brain and spinal cord are functioning properly. The absence of certain reflexes, or their persistence beyond the expected age, can sometimes indicate neurological concerns that require further evaluation.

Testing reflexes is a gentle and non-invasive process that the healthcare provider can incorporate into the general physical examination. Parents often find it fascinating to observe their baby's reflexes, as they demonstrate the remarkable capabilities that newborns are born with. Each reflex has a specific developmental timeline for when it appears and when it should naturally disappear as the baby grows and develops more voluntary control over their movements.

It is important to understand that the presence of these reflexes varies slightly from baby to baby, and the strength of a reflex at any given moment can be influenced by factors such as the baby's state of alertness, whether they are hungry or recently fed, and the environment. Healthcare providers take these factors into account when interpreting reflex findings.

Moro and Rooting Reflexes

The Moro reflex, also called the startle reflex, is one of the most easily observed newborn reflexes. When triggered by a sudden noise, a feeling of falling, or being placed on their back quickly, the baby extends their arms outward with fingers spread, then draws them back inward as if embracing. This reflex is believed to be an evolutionary survival mechanism. It is typically present from birth and gradually disappears by 4 to 6 months of age as the baby develops more control over voluntary movements.

The rooting reflex is essential for feeding. When the baby's cheek or the corner of the mouth is gently stroked, the baby turns their head toward the stimulus and opens their mouth, searching for a nipple or breast. This reflex helps the baby locate food and is particularly strong when the baby is hungry. It typically begins to fade around 3 to 4 months as the baby learns to turn toward food voluntarily.

Grasp and Stepping Reflexes

The palmar grasp reflex is triggered when you place a finger in the baby's palm. The baby will grip the finger surprisingly tightly, sometimes strongly enough that they could briefly support their own weight (though this should never be tested). This reflex is present from birth and fades around 5 to 6 months as the baby develops voluntary grasping skills. A similar reflex exists in the feet, called the plantar grasp reflex, where the toes curl down when the sole of the foot is stroked.

The stepping reflex is one of the most fascinating newborn reflexes. When held upright with their feet touching a flat surface, newborns will make stepping or walking-like movements. This reflex disappears around 2 to 3 months and is not directly related to later walking ability. It reappears as the voluntary ability to walk develops, typically around 10 to 14 months of age.

What Screening Tests Are Performed on Newborns?

Newborn screening includes the heel prick test (newborn blood spot screening) for metabolic and genetic conditions such as PKU and congenital hypothyroidism, hearing screening using OAE or ABR technology, and in many countries, pulse oximetry to screen for critical congenital heart defects. These tests are designed to detect conditions where early treatment can prevent serious complications or disability.

Newborn screening programs represent one of the most successful public health initiatives in modern medicine. By testing seemingly healthy babies for a panel of rare but serious conditions, healthcare systems can identify affected infants before symptoms develop, allowing treatment to begin early when it is most effective. The specific conditions included in screening programs vary between countries and regions, but the core principle remains the same: early detection saves lives and prevents disability.

The concept of newborn screening dates back to the 1960s when Dr. Robert Guthrie developed a simple blood test for phenylketonuria (PKU), a metabolic condition that can cause severe intellectual disability if not treated with dietary management from birth. Since then, advances in laboratory technology have made it possible to screen for dozens of conditions from a single blood sample. The WHO recommends that newborn screening programs should be available to all babies as part of universal healthcare.

Parents sometimes worry about the screening process, but it is important to understand that these tests are well-established, highly accurate, and the small amount of discomfort involved is far outweighed by the potential benefits of early detection. A positive screening result does not necessarily mean the baby has the condition, as further confirmatory testing is always performed before a diagnosis is made.

Heel Prick Test (Blood Spot Screening)

The heel prick test, also known as the newborn blood spot screening or Guthrie test, is usually performed when the baby is between 24 and 72 hours old. A healthcare provider gently pricks the baby's heel and collects a few drops of blood on a special filter paper card. The blood is then sent to a laboratory for analysis. The test screens for a range of rare but serious conditions that can be treated effectively if caught early.

Conditions commonly screened for include phenylketonuria (PKU), where the body cannot break down the amino acid phenylalanine; congenital hypothyroidism, where the thyroid gland does not produce enough thyroid hormone for normal growth and development; cystic fibrosis, a genetic condition affecting the lungs and digestive system; sickle cell disease and other hemoglobin disorders; and medium-chain acyl-CoA dehydrogenase deficiency (MCADD), a fatty acid oxidation disorder. Many countries now screen for 20 to 50 conditions or more using tandem mass spectrometry technology.

Results are typically available within 1 to 2 weeks. If the screening result is normal, parents may not receive any notification at all, or they may receive a letter confirming the result. If a result is abnormal or inconclusive, the family will be contacted promptly to arrange confirmatory testing. It is important for parents to know that a positive screening result means further investigation is needed, not that the baby definitely has the condition. False positive results do occur, and confirmatory testing is always performed before any diagnosis is made.

Hearing Screening

Universal newborn hearing screening is recommended by the WHO and is standard practice in most developed countries. Hearing loss affects approximately 1 to 3 per 1,000 newborns, making it one of the most common congenital conditions. Early identification is crucial because the first months and years of life are critical for speech and language development. Research consistently shows that babies identified with hearing loss before 3 months of age and who receive intervention by 6 months have significantly better language outcomes.

Two types of hearing tests are commonly used for newborn screening: Otoacoustic Emissions (OAE) and Auditory Brainstem Response (ABR). The OAE test works by placing a small soft-tipped earphone in the baby's ear canal that produces sounds and measures the echo produced by the inner ear. The ABR test uses small sensors placed on the baby's head to measure how the auditory nerve responds to sound. Both tests are painless and are usually performed while the baby is sleeping. They take only a few minutes to complete.

If a baby does not pass the initial hearing screening, it does not necessarily mean they have hearing loss. Factors such as fluid in the ear canal from birth or a noisy testing environment can cause false-positive results. A follow-up test is arranged, usually within 2 to 4 weeks, and if concerns remain, the baby is referred to a specialist audiologist for comprehensive hearing evaluation.

Pulse Oximetry Screening

Pulse oximetry screening for critical congenital heart defects (CCHD) is now recommended in many countries as part of routine newborn screening. This simple, painless test measures the oxygen levels in the baby's blood using a small sensor placed on the baby's hand and foot. The test is typically performed when the baby is at least 24 hours old or shortly before discharge.

Critical congenital heart defects affect approximately 2 to 3 per 1,000 births and can be life-threatening if not identified and treated promptly. While many heart defects are detected during pregnancy or during the physical examination (by hearing a heart murmur), some defects may not be apparent until the baby is a few days or weeks old. Pulse oximetry can help identify babies with low oxygen levels that may indicate an undetected heart defect, prompting further investigation with echocardiography.

What Are Common Findings During Newborn Examinations?

The most common findings during newborn examinations include neonatal jaundice (yellowing of skin, affects 60% of full-term babies), milia (tiny white bumps on the face), Mongolian spots (bluish-gray patches on the back or buttocks), erythema toxicum (harmless red blotches), birth marks, and minor head molding from delivery. Most of these are normal variations that resolve on their own without treatment.

One of the most important aspects of the newborn examination is distinguishing between normal variations and conditions that require medical attention. Newborns undergo dramatic physiological changes in the first days of life as they transition from the protected environment of the womb to the outside world. Many of the findings that parents notice or that healthcare providers identify during examinations are completely normal parts of this transition and will resolve on their own without any treatment.

Understanding these common findings can help parents avoid unnecessary worry and recognize when something truly warrants medical attention. Healthcare providers are trained to identify and explain these findings, and parents should always feel comfortable asking questions about anything they notice on their baby's body.

Neonatal Jaundice

Neonatal jaundice is the most common condition identified during newborn examinations, affecting approximately 60% of full-term babies and 80% of premature babies. It causes a yellow tint to the baby's skin and the whites of the eyes, and is caused by elevated levels of bilirubin, a yellow pigment produced when red blood cells break down. Newborns produce bilirubin at a higher rate than adults, and their immature livers may not process it efficiently in the first few days.

In most cases, neonatal jaundice is physiological (normal) and resolves on its own within 1 to 2 weeks. It typically appears on day 2 or 3 of life. Healthcare providers monitor bilirubin levels by visual assessment and, if needed, by blood tests or transcutaneous bilirubin measurement (a painless device held against the skin). If bilirubin levels become too high, treatment with phototherapy (special blue-spectrum lights) may be recommended. Very rarely, extremely high bilirubin levels can cause a condition called kernicterus, which can damage the brain, which is why monitoring is important.

Skin Variations

Newborn skin shows a wide variety of normal variations that can look concerning to new parents. Milia are tiny white or yellow bumps, usually on the nose and cheeks, caused by trapped keratin beneath the skin. They affect up to 50% of newborns and disappear on their own within a few weeks. Erythema toxicum is a very common rash consisting of small red blotches with tiny white or yellow centers that can appear anywhere on the body. Despite its alarming name, it is completely harmless and usually resolves within days.

Mongolian spots (also called dermal melanocytosis) are flat, bluish-gray patches that appear on the lower back, buttocks, or sometimes limbs. They are most common in babies with darker skin tones and are caused by pigment cells trapped in the deeper layers of skin during development. They are completely harmless and typically fade gradually over the first few years of life. Stork bites (salmon patches) are flat, pink-red birthmarks commonly found on the back of the neck, eyelids, or forehead, caused by clusters of blood vessels near the skin surface. Those on the eyelids and forehead usually fade within 1 to 2 years, while those on the back of the neck may persist but are usually covered by hair.

When Should You Contact a Doctor About Your Newborn?

Contact a healthcare provider promptly if your newborn shows signs of difficulty breathing, persistent blue color (cyanosis), fever above 38°C (100.4°F) or below 36°C (96.8°F), excessive sleepiness or difficulty waking for feeds, poor feeding or refusal to eat, persistent vomiting (especially green bile-stained), fewer than expected wet or dirty diapers, or a yellow color that worsens or does not improve after 2 weeks.

While most newborns are perfectly healthy and the examinations are reassuring, it is essential for parents to know when to seek medical attention. Newborns can deteriorate quickly, and certain symptoms should always prompt urgent evaluation. Trust your instincts as a parent: if something about your baby does not seem right, it is always better to seek medical advice than to wait and see.

The transition from hospital to home can feel daunting for new parents. During the hospital stay, professionals are constantly available to monitor your baby. Once at home, parents become the primary observers of their baby's health. Understanding what is normal and what warrants concern is one of the most empowering things new parents can learn.

Some warning signs require immediate emergency care, while others should be assessed by a healthcare provider within the same day. The distinction often lies in the severity and combination of symptoms. A single episode of spitting up after a feed, for example, is completely normal, but frequent, forceful vomiting, especially if the vomit is green or blood-stained, requires prompt evaluation.

Signs That Need Same-Day Assessment

Some signs, while not immediately life-threatening, should be assessed by a healthcare provider within the same day. These include refusing to feed or feeding much less than usual for more than 8 hours, fewer wet diapers than expected (fewer than 6 in 24 hours after day 4 of life), persistent crying that is unusual for the baby, increasing jaundice (yellowness spreading to the legs and arms), a swollen or bulging fontanelle (soft spot), signs of infection at the umbilical cord stump (redness spreading from the base, discharge, or foul smell), and a temperature below 36°C (96.8°F) despite warming measures.

What Follow-Up Examinations Are Recommended?

After the initial newborn examinations, babies should have follow-up checks at 1-2 weeks (weight check and feeding assessment), 6-8 weeks (comprehensive examination including repeat hip and heart checks), and regular well-child visits at 2, 4, 6, 9, and 12 months during the first year. Vaccination schedules typically begin at 6-8 weeks. These visits monitor growth, development, and provide an opportunity for parents to discuss any concerns.

The newborn examinations performed in the hospital are just the beginning of a series of health checks that monitor your baby's growth and development throughout childhood. Regular follow-up appointments are essential because some conditions may not be apparent at birth and only become detectable as the baby grows. These visits also provide ongoing support for parents, particularly around feeding, sleep, and developmental milestones.

The WHO recommends that all newborns receive at least three postnatal care contacts within the first week of life: one within 24 hours of birth, one on day 3 (48-72 hours), and one between days 7 and 14. In many countries, additional home visits by a midwife or health visitor are standard practice during the first two weeks. These early visits focus on monitoring the baby's weight gain, assessing feeding, checking for jaundice, and supporting parental well-being including screening for postnatal depression.

The 6 to 8-week examination is particularly important as it represents a second comprehensive physical examination similar to the one performed at birth. The heart is listened to again, as some murmurs only become audible after a few weeks. The hips are rechecked, and a developmental assessment is performed to ensure the baby is meeting early milestones such as tracking objects with their eyes, responding to sounds, and showing some head control. This visit often coincides with the first set of vaccinations in many countries.

Growth and Development Monitoring

At each follow-up visit, the baby's weight, length, and head circumference are measured and plotted on growth charts. Consistent growth along a percentile curve is more important than the specific percentile the baby is on. Healthcare providers look for growth patterns that deviate significantly from the expected trajectory, which may indicate underlying health issues such as feeding problems, metabolic conditions, or hormonal imbalances.

Developmental milestones are also assessed at each visit. During the first year, key milestones include social smiling (by 6-8 weeks), reaching for objects (by 4-5 months), sitting independently (by 6-9 months), and first steps (by 10-14 months). There is a wide range of normal for when babies achieve each milestone, and healthcare providers use standardized assessment tools to identify any developmental delays that may benefit from early intervention services.