Alcohol-related birth defects are a group of lifelong changes caused by alcohol exposure during pregnancy. They can include facial differences, growth delays, and learning or behavior challenges. Babies and children with alcohol-related birth defects may have attention, memory, or coordination problems that affect school and daily life. Not everyone will have the same experience, and features can range from mild to more severe. There is no cure, but early therapies, special education supports, and regular healthcare can improve outcomes and help many live healthy, meaningful lives.
Overview
Alcohol-related birth defectsSymptoms
Alcohol-related birth defects show early signs like poor growth, feeding trouble, and distinctive facial features. Many children have learning and behavior challenges, coordination issues, and sensory sensitivities. Some have heart, kidney, hearing, or vision problems noted in infancy.
Outlook and prognosis
Many living with alcohol-related birth defects can make steady gains with early therapies, a stable home routine, and school supports. Challenges with learning, attention, and impulse control often persist into adulthood, but skills usually improve. Lifelong follow-up helps prevent avoidable setbacks.
Causes and risk factors
Alcohol-related birth defects stem from alcohol exposure during pregnancy; no known safe amount or timing. Risk rises with heavy or binge drinking, early gestation exposure, maternal–fetal genetic differences, poor nutrition, liver disease, tobacco or drug use, and limited prenatal care.
Genetic influences
Genetics plays a modest role in alcohol-related birth defects; alcohol exposure during pregnancy is the primary driver. Variations in genes for alcohol-metabolizing enzymes and placental transport can shift risk and severity. Family history doesn’t guarantee outcomes, but susceptibility differs.
Diagnosis
Doctors base diagnosis of alcohol-related birth defects on clinical features and confirmed prenatal alcohol exposure. A multidisciplinary exam, growth measurements, and developmental testing are key, with imaging and genetic tests used to document organ findings and rule out other syndromes.
Treatment and drugs
Care focuses on early supports and preventing further alcohol exposure. Alcohol-related birth defects are managed with tailored therapies—such as speech, physical, and occupational therapy—developmental and educational services, family support, and regular check-ins. Some may also benefit from targeted medications for attention, behavior, or mood.
Symptoms
Alcohol-related birth defects can affect growth, appearance, and how a child eats, sleeps, learns, and moves. Some signs are visible at birth, while others show up as a child begins to feed, develop motor skills, speak, and go to school. Features vary from person to person and can change over time. Not every child has the same pattern, and the mix of challenges can be mild to more pronounced.
A smooth area between the nose and upper lip, a thin upper lip, and smaller eye openings may be seen. These facial features are most notable in early childhood and can be subtle. Not everyone with alcohol-related birth defects has these traits.
Babies may be smaller at birth and grow more slowly afterward. Height and weight can lag behind peers even with good nutrition. Growth patterns in alcohol-related birth defects range from mild to more noticeable.
In newborns, early features of alcohol-related birth defects can include a weak suck and slow feeding. Some infants have reflux or poor weight gain. Extra time, specialized nipples, or feeding therapy can help.
Newborns and infants may be unusually fussy with irregular sleep-wake cycles. Frequent awakenings can make days harder for the baby and caregivers.
How people usually first notice Alcohol-related birth defects?
Many families first notice alcohol-related birth defects when a newborn has a small head size, smooth skin between the nose and upper lip, thin upper lip, or low birth weight, and feeding or sleeping is harder than expected. As babies grow, doctors may pick up the first signs of alcohol-related birth defects through developmental check-ups, such as delayed motor skills, trouble calming, poor attention, or slow weight gain, prompting an evaluation for fetal alcohol spectrum disorders. In preschool or early school years, teachers and parents often recognize learning or behavior challenges—like difficulty with memory, impulse control, or following multi-step directions—which can be the tipping point for diagnosis and support.
Types of Alcohol-related birth defects
Alcohol-related birth defects can affect day-to-day learning, behavior, growth, and physical features, and these can vary widely from child to child. Clinicians often describe them in these categories: it helps families and teachers anticipate needs and tailor support. Not everyone will experience every type, and the mix of features may change as a child grows and school demands increase.
FAS (full syndrome)
This type includes specific facial features, slower growth, and brain-based differences that affect learning and behavior. Early symptoms of alcohol-related birth defects in this group may include feeding difficulties in infancy and later challenges with attention and impulse control. Hearing or vision issues can also occur.
Partial FAS
People meet some but not all features seen in full FAS, often with brain-based challenges and some facial findings. Day-to-day, this may look like trouble with memory, planning, or social cues even if growth and facial features are less pronounced. School support and structured routines often help.
ARND (neurodevelopmental)
The main issues are thinking, learning, and behavior without the specific facial features. Families may notice attention problems, trouble with math or reading, and difficulty shifting between tasks. Emotional regulation can be harder during stress or transitions.
ARBD (birth defects)
This pattern involves structural differences in organs or bones associated with prenatal alcohol exposure. Examples can include heart, kidney, or skeletal differences, sometimes found on exams or imaging. Learning and behavior can be typical or affected to varying degrees.
FASD umbrella term
Many clinicians use fetal alcohol spectrum disorder (FASD) to describe the full range of effects. FASD is not a single diagnosis but a spectrum that includes the types of alcohol-related birth defects above. Types of alcohol-related birth defects within FASD differ mainly by which body systems are affected and how strongly.
What genetics can tell you about symptoms
Some alcohol-related birth defects link to genes that process alcohol, like ADH1B and ALDH2; slower variants can raise fetal exposure, increasing risks of growth restriction, facial differences, and learning or behavior challenges. Variants in genes guiding brain development (e.g., BDNF) may heighten neurodevelopmental impacts.
Causes and risk factors
Alcohol use during pregnancy is the direct cause of alcohol-related birth defects, and there is no known safe amount or time to drink. Common risk factors for alcohol-related birth defects include binge drinking, frequent use, and drinking before realizing you are pregnant. Poor nutrition, smoking or other drug use, high stress, and limited prenatal care can add to the harm. Some risks are modifiable (things you can change), others are non-modifiable (things you can’t). Genes in the mother and baby that affect how alcohol is broken down can change vulnerability, but they do not make alcohol safe in pregnancy.
Environmental and biological risk factors
For expectant families, it helps to understand what raises the chance of alcohol-related birth defects. These include environmental and biological risk factors for alcohol-related birth defects that shape how the developing baby responds to exposure. Doctors often group risks into internal (biological) and external (environmental). The amount and timing of alcohol exposure, along with placental health and nutrition, can shift risk up or down.
The more alcohol that reaches the developing baby, the higher the risk of alcohol-related birth defects. Short periods with very high levels can be especially harmful because the fetus clears alcohol slowly.
Exposure during early organ formation raises the risk of physical birth defects, while exposure later in pregnancy can still affect growth and brain development. Risk for alcohol-related birth defects exists throughout pregnancy.
Alcohol crosses the placenta easily, so the developing baby’s level can mirror the pregnant person’s blood level. Placental health issues, like reduced blood flow, may increase vulnerability to alcohol-related birth defects.
Low intake of key nutrients such as folate, iron, and choline can magnify alcohol’s effects on development. Malnutrition has been linked with a higher chance of alcohol-related birth defects.
Genetic risk factors
Alcohol-related birth defects are not directly inherited, but biology can influence how vulnerable a pregnancy is to alcohol’s effects. Carrying a genetic change doesn’t guarantee the condition will appear. Genetic risk factors for alcohol-related birth defects include differences in how alcohol and its byproducts are processed, how the placenta transports substances, and how developing tissues respond to stress. These inherited traits can shape both the chance that damage happens and which organs are most affected.
Maternal metabolism genes: Variants in enzymes that break down alcohol can lead to higher or longer-lasting alcohol levels in the bloodstream. This can increase how much reaches the fetus and raise the risk of alcohol-related birth defects. Effects may vary by the specific variant.
Fetal metabolism genes: The fetus also makes enzymes that process alcohol and its byproducts. Genetic differences here can change how sensitive developing organs are and how well they clear harmful compounds. This can influence features seen in alcohol-related birth defects.
Placental transport genes: Changes in genes that direct how the placenta moves substances can alter alcohol transfer and nutrient delivery. That can affect how much alcohol gets to the baby and how tissues cope with it. These differences can raise the likelihood of alcohol-related birth defects.
Oxidative stress response: Genes that control antioxidant defenses help cells handle stress from alcohol. Variants with lower protection may allow more damage to the brain, heart, or face during key growth windows. People with the same risk factor can have very different experiences.
DNA repair pathways: Differences in genes that manage DNA repair and cell survival can shift how cells respond after alcohol exposure. Reduced repair capacity may raise the chance of lasting changes in developing tissues. This can shape which features are seen by doctors.
Folate pathways: Variants in genes that use folate can influence cell division and brain growth. These differences may modify how strongly alcohol disrupts development. Evidence for specific genes is mixed across studies.
Neurodevelopment genes: Small differences across many genes that guide brain and facial formation can alter vulnerability. Together, they may act like dimmer switches that raise or lower sensitivity to alcohol’s effects. Science continues to uncover how these elements interact.
Family clustering: When alcohol-related birth defects occur in related pregnancies, it can suggest inherited susceptibility. This does not mean the condition itself is passed down as a single-gene disorder. Patterns point to shared genetic contributions to risk.
Ancestry-linked variants: Certain metabolism gene variants are more common in some ancestries. This can change how alcohol is handled in pregnancy and influence risk profiles in those groups. Individual risk still varies widely.
Epigenetic machinery: Genes that set chemical tags on DNA and organize chromosomes help tune gene activity during development. Variants here may change how fetal cells respond to alcohol and how long those changes persist. Current evidence suggests modified susceptibility rather than direct inheritance.
Lifestyle risk factors
Alcohol-related birth defects are present from birth; an individual’s current habits did not cause the condition. However, daily routines, diet, activity, and caregiving practices can influence symptoms, learning, and long-term complications. When discussing lifestyle risk factors for Alcohol-related birth defects, think of modifiable habits that can worsen or ease challenges, not the original cause. Below are ways how lifestyle affects Alcohol-related birth defects in day-to-day life.
Predictable schedules and clear transitions reduce anxiety and behavioral outbursts. Structure supports executive function difficulties common in this condition.
A regular bedtime, dark room, and calming wind-down improve daytime attention and emotional regulation. Better sleep can lower irritability and reduce meltdowns.
Regular, guided movement (e.g., balance games, swimming) can improve coordination and motor planning. Activity also helps attention and mood stability.
Regular meals with protein and fiber help steady energy and focus. Addressing feeding challenges supports growth and reduces midday crashes that worsen behavior.
Risk prevention
Alcohol-related birth defects are largely preventable by avoiding alcohol before and during pregnancy. Even small amounts can affect a developing baby, so there’s no known safe time or safe dose. Prevention works best when combined with regular check-ups. Knowing the early symptoms of alcohol-related birth defects can help families seek support, but the goal is to prevent exposure from the start.
Avoid alcohol when trying to conceive and throughout pregnancy. Even occasional drinks can harm a developing baby.
Use reliable contraception if you drink alcohol and aren’t ready for pregnancy. Plan to stop alcohol before you start trying.
Book care as soon as you think you might be pregnant. Tell your clinician about any alcohol use so they can support safer choices.
Ask for screening and counseling if cutting back is hard. Treatment and recovery programs can help you avoid alcohol during pregnancy.
Transmission
Alcohol-related birth defects are not contagious and do not spread from child to child or adult to child. They are not inherited; there is no genetic transmission of alcohol-related birth defects. These problems happen only when a developing baby is exposed to alcohol during pregnancy, because alcohol in the pregnant person’s blood crosses the placenta and reaches the fetus. Any amount of alcohol can reach the baby, and risk increases with heavier or repeated drinking; there is no known safe time or safe amount in pregnancy. Avoiding alcohol during pregnancy prevents alcohol-related birth defects.
When to test your genes
Consider genetic testing if alcohol exposure occurred during pregnancy and a child shows developmental delays or facial/organ differences, to clarify risks and tailor care. Testing can also help when family history suggests inherited vulnerabilities that may compound alcohol-related effects. Talk with a genetics professional to choose tests that inform early interventions.
Diagnosis
Doctors make the diagnosis of Alcohol-related birth defects by looking for a consistent pattern of physical features, growth differences, and learning or behavior challenges present from early life. There isn’t a single blood test; instead, specialists piece together findings from exams, developmental testing, and history. This careful approach explains how diagnosis of Alcohol-related birth defects is made in practice. Early and accurate diagnosis can help you plan ahead with confidence.
Doctors look for a recognizable pattern that can include smaller growth, certain facial features, and nervous system differences. The overall picture matters more than any one sign.
Height, weight, and head size are plotted over time to see if they are consistently below expected ranges. Steady patterns across visits help distinguish long‑standing growth restriction from short‑term illness.
Specialists assess small eye openings, a smooth ridge between the nose and upper lip, and a thin upper lip. Careful measurements or standardized photos can make this more reliable.
Clinicians ask about possible alcohol use during pregnancy in a nonjudgmental way. Confirmed exposure supports the diagnosis, but lack of confirmed history does not rule it out if features are strongly suggestive.
Stages of Alcohol-related birth defects
Alcohol-related birth defects do not have defined progression stages. These differences are present from birth and may become noticeable at different ages depending on which organs are affected, but they do not follow a step-by-step worsening pattern. Doctors look at growth, physical features, medical history including possible prenatal alcohol exposure, and early symptoms of alcohol-related birth defects such as feeding difficulties or delays in development. Different tests may be suggested to help check the heart, kidneys, hearing, vision, and learning, and sometimes genetic testing is used to rule out other causes.
Outlook and prognosis
Looking ahead can feel daunting, but most children with alcohol-related birth defects can make meaningful gains with early, steady support at school, in therapies, and at home. Outcomes vary based on which organs and systems were affected before birth—learning and attention, growth, facial features, heart or kidney structure, bones, vision, and hearing can all play a role. Early care can make a real difference, especially when speech, occupational, and educational services start in the preschool years and continue as needs change.
The outlook is not the same for everyone, but many living with alcohol-related birth defects do well when their care team coordinates medical follow-up with behavior and learning supports. Some children need surgery for heart or orthopedic issues, while others mainly need help with memory, planning, or impulse control; early symptoms of alcohol-related birth defects can be subtle and sometimes don’t become clear until school demands increase. Life span is usually near typical when major organ problems are mild and when infections, seizures, and injuries are prevented and treated promptly. When serious heart, kidney, or brain complications are present, the risk of early mortality is higher, especially in the first years of life, but this risk drops with timely diagnosis, regular care, and a stable, low-stress environment.
Knowing what to expect can ease some of the worry. As teens transition to adulthood, challenges with independence, money management, or social judgment may come to the forefront, and structured supports can help prevent secondary problems like school dropout, substance use, or legal trouble. With ongoing care, many people maintain good health, pursue vocational training, and build strong support networks. Talk with your doctor about what your personal outlook might look like, including which specialists to see, how often to check hearing, vision, growth, and heart health, and what community services can strengthen long-term outcomes.
Long-term effects
Alcohol-related birth defects can lead to lifelong differences in thinking, learning, growth, and organ health. Some features are noticeable in childhood and continue into adult life, while others become clearer when school or work demands increase. Long-term effects vary widely, and not everyone has the same set or severity of features. Outlook depends on which body systems are affected and how challenges change across life stages.
Many have trouble with reading, math, or processing information at typical speed. Difficulties often persist into adolescence and adulthood.
Ongoing inattention, distractibility, or hyperactivity can affect school, work, and daily tasks. These traits may be present even without a diagnosis like ADHD.
Planning, organizing, and flexible thinking can remain hard. People may struggle with time management and multi-step tasks across adulthood.
Short-term and working memory are often affected. This can make it harder to follow instructions or retain new information over time.
How is it to live with Alcohol-related birth defects?
Living with alcohol-related birth defects can mean navigating a mix of physical differences, learning challenges, and sensory sensitivities that make everyday tasks—like focusing in class, adapting to changes in routine, or managing impulse control—take more planning and support. Many find that consistent structure, visual cues, extra time for transitions, and therapies such as speech, occupational, or behavioral support help daily life feel more predictable and successful. Families, caregivers, and teachers often become skilled at breaking tasks into steps, offering calm reminders, and celebrating progress, which can strengthen relationships but also require patience and respite. With a stable environment and tailored supports, people with alcohol-related birth defects can build on their strengths and participate in school, work, and community life in meaningful ways.
Treatment and drugs
Alcohol-related birth defects are managed by focusing on your child’s needs today and helping prevent new problems over time. There’s no single medicine that reverses alcohol exposure before birth, so care usually blends therapies: early education support, speech and occupational therapy, behavioral coaching, and, when needed, medicines for attention, mood, sleep, or impulse control. Doctors sometimes recommend a combination of lifestyle changes and drugs to make school, home routines, and social situations easier to navigate. Regular check-ins help adjust plans as your child grows, and may include vision or hearing care, nutrition support, and treatment for heart, bone, or growth issues if present. Supportive care can make a real difference in how you feel day to day, so ask your doctor about the best starting point for you and where to find local developmental services.
Non-drug treatment
Day-to-day, families often focus on building skills, easing behaviors, and creating a steady routine so children can learn and thrive at home and school. Non-drug treatments often lay the foundation for progress, with therapy plans tailored to a child’s strengths and challenges. These approaches can start early and continue through adolescence and adulthood as needs change. Alcohol-related birth defects care is most effective when services are coordinated and practical for daily life.
Starting services in infancy can boost learning, movement, and communication. This is especially helpful when early symptoms of alcohol-related birth defects include delays in speech or motor skills.
Therapists build hand skills, self-care, and sensory regulation with play-based practice. This helps with dressing, feeding, handwriting, and coping with noisy or busy settings.
Sessions strengthen understanding, expression, and social communication. Therapists can also help with feeding and swallowing if needed.
Exercises and play build strength, balance, and coordination. This can make walking, running, and playground activities safer and more confident.
Your genes may have an impact on how drugs work for you
Medicines used in pregnancy, like anti-nausea drugs or antidepressants, can act differently depending on a parent’s and fetus’s genes that control drug metabolism, transport, and sensitivity. These genetic differences can change effectiveness and side‑effect risks, influencing alcohol-related birth defect outcomes.
Pharmacological treatments
Medicines for alcohol-related birth defects focus on easing day-to-day symptoms like attention problems, irritability, sleep difficulties, and seizures. They do not reverse prenatal alcohol exposure, but they can help learning, behavior, and family routines feel more manageable. Not everyone responds to the same medication in the same way. Doctors usually start low and adjust slowly, watching benefits and side effects over time.
Methylphenidate or dexmethylphenidate, and amphetamine options like lisdexamfetamine or mixed amphetamine salts can improve focus and reduce hyperactivity. They may lessen impulsive behavior seen among early symptoms of alcohol-related birth defects. Common effects include reduced appetite and trouble sleeping, so timing and dose matter.
Atomoxetine is a non-stimulant that can help attention and impulse control when stimulants aren’t a good fit. It may take several weeks to see full benefit. Dosing may be increased or lowered gradually to balance effects and side effects.
Guanfacine ER or clonidine ER can reduce impulsivity, hyperactivity, and sleep-onset problems. They may also ease irritability and tics. Possible side effects include sleepiness and low blood pressure, so monitoring is important.
Fluoxetine, sertraline, or escitalopram can help anxiety, low mood, and repetitive or rigid behaviors. Benefits build gradually over weeks. Side effects, if they occur, can often be managed by dose changes or timing.
Genetic influences
Alcohol-related birth defects are not passed down in families the way many genetic disorders are. Beyond lifestyle factors, genetics may also contribute. Differences in the mother’s and baby’s genes that influence how alcohol is broken down, how the placenta moves substances across, and how developing tissues handle stress can change how vulnerable a fetus is to alcohol. That’s one reason two pregnancies with similar drinking patterns can lead to very different outcomes, even among twins. Family history by itself isn’t a strong predictor, but research has identified genetic risk factors for alcohol-related birth defects that may raise or lower susceptibility. There isn’t a routine genetic test to predict these problems, and results—when genetic testing is done for other reasons—cannot confirm or rule out alcohol-related birth defects for a specific baby. Talking with a genetic counselor can help put your family history and exposure details in context and guide next steps.
Is Alcohol-related birth defects genetic?
Genetics plays a modest role in alcohol-related birth defects; alcohol exposure during pregnancy is the primary driver. Variations in genes for alcohol-metabolizing enzymes and placental transport can shift risk and severity. Family history doesn’t guarantee outcomes, but susceptibility differs.
Pharmacogenetics—how genetics influence drug effects
For many living with alcohol-related birth defects, treatment often uses medicines to help with attention, mood, sleep, or seizures rather than a single cure. Alongside medical history and current symptoms, genetic testing can sometimes help tailor the choice or dose of certain medicines. Inherited differences in liver enzymes can change how quickly the body clears some antidepressants, antipsychotics, and ADHD medicines, which may affect side effects or whether a usual dose works well. For seizure medicines, certain genetic results are checked in some populations before starting drugs like carbamazepine or similar options to lower the risk of rare but serious skin reactions. Pharmacogenetic information is also used for medicines such as atomoxetine and several antidepressants, where faster or slower processing can guide dosing or a switch to another option. Genetics is only one factor; age, overall health, and organ function in alcohol-related birth defects also influence drug response, so pharmacogenetic testing for alcohol-related birth defects is usually paired with careful follow-up and dose adjustments over time.
Interactions with other conditions
Day to day, Alcohol-related birth defects can interact with other health issues in ways that affect learning, behavior, and physical health. Doctors call it a “comorbidity” when two conditions occur together, and many living with alcohol-related birth defects also have attention or learning disorders. Early symptoms of alcohol-related birth defects may overlap with autism traits or language delays, which can make it harder to sort out what’s driving challenges at school or home. Some people also have heart, kidney, vision, or hearing differences, so respiratory infections, ear infections, or the recovery from surgeries may have extra considerations.
Seizures can occur in a subset of children, and sleep problems or anxiety may add to behavioral symptoms. Because some have liver or kidney differences, certain medications—especially those for attention, mood, or seizures—may need careful dosing and monitoring to avoid side effects while still working well.
How genes can cause diseases
Humans have more than 20,000 genes, each carrying out one or a few specific functions in the body. One gene instructs the body to digest lactose from milk, another tells the body how to build strong bones and another prevents the body's cells from beginning to multiply uncontrollably and developing into cancer. As all of these genes combined are the building instructions for our body, a defect in one of these genes can have severe health consequences.
Through decades of genetic research, we know the genetic code of any healthy/functional human gene. We have also identified that in certain positions on a gene, some individuals may have a different genetic letter from the one you have. We call these hotspots "Genetic Variations" or "Variants" in short. In many cases, studies have been able to show that having the genetic letter "G" in the position makes you healthy, but having the letter "A" in the same position disrupts the gene function and causes a disease. Genopedia allows you to view these variants in genes and summarizes all that we know from scientific research, which genetic letters (Genotype) have good or bad consequences on your health or on your traits.
History
Throughout history, people have described babies born smaller than expected, with feeding troubles, or slow to meet milestones after heavy drinking was common in a household or community. Midwives and doctors in different countries quietly noted patterns across siblings and cousins—one child with a smooth upper lip and short opening between the eyelids, another with balance problems or trouble focusing in school. Families and communities once noticed patterns that linked heavier drinking in pregnancy with children who had more learning and behavior challenges.
From early reports in the mid‑20th century, clinicians began to connect prenatal alcohol exposure with a recognizable set of features. First described in the medical literature as a cluster of facial traits, growth differences, and developmental delays, the picture gradually widened. Initially understood only through symptoms, later studies followed children into adolescence and adulthood and showed how attention, memory, and planning skills can be affected long term, even when facial features are subtle or absent. As medical science evolved, researchers also recognized that alcohol-related birth defects can include heart, kidney, bone, and hearing differences—findings a doctor sees on exam or imaging, not just what a parent notices day to day.
In recent decades, awareness has grown across both the United States and Europe, with public health campaigns emphasizing that there is no known safe amount of alcohol during pregnancy. Over time, descriptions became more precise, separating alcohol-related birth defects from other causes of developmental delay and refining how clinicians assess exposure, growth, facial features, and neurodevelopment. These historical steps helped shape current guidelines that focus on early identification, supportive therapies, and prevention.
Understanding has also broadened to include variability. Some people with alcohol-related birth defects have clear physical signs in infancy; others are first recognized because of learning differences in primary school. Not every early description was complete, yet together they built the foundation of today’s knowledge. This history explains why early symptoms of alcohol-related birth defects may be missed and why a thorough developmental evaluation matters, even when appearance seems typical.
Looking back helps explain how language has changed, too. Terms once used loosely have been replaced with clearer categories that reflect what clinicians observe and what families experience. Advances in genetics improved our ability to rule out other inherited conditions, while confirming that alcohol itself—not a child’s genes—drives the core pattern. Building on this early work, scientists continue to refine tools that help identify affected children sooner, so families can get practical support during the years it helps most.