Congenital Anomalies
Differences in the body present from birth
Quick Facts
- Type: Conditions present at birth
- Also called: Birth defects
- Can affect: Heart, brain, limbs, and more
- Often found by: Prenatal or newborn screening
Overview
Congenital anomalies, commonly called birth defects, are differences in the structure or function of the body that are present at birth. They can affect almost any part of the body, including the heart, brain and spine, face, limbs, and internal organs. Some are mild and cause few problems, while others are serious and may need treatment soon after birth.
These conditions can arise during early development in the womb. Examples include congenital heart defects, neural tube differences, cleft lip and palate, and infections present at birth. Many are identified through prenatal or newborn screening, and improvements in care mean that many children with congenital anomalies grow up to lead full lives.
Symptoms
Signs depend entirely on which part of the body is affected and how severe the difference is. Possible findings include:
- Visible differences in the face, limbs, or skin at birth
- Breathing difficulty or a bluish color (with some heart or lung conditions)
- Feeding problems or poor weight gain
- Delays in movement, growth, or development
- Differences seen only on imaging or testing, such as some heart or kidney conditions
Some anomalies are obvious at birth, while others are not apparent until later in childhood or are found only through testing.
Causes
For many congenital anomalies, no single cause is identified, and several factors may combine. Recognized contributors include:
- Genetic and chromosomal differences: Changes in genes or chromosomes that affect development.
- Infections during pregnancy: Certain infections passed to the baby before birth.
- Exposures in pregnancy: Some medications, alcohol, and certain chemicals or radiation.
- Nutritional factors: For example, low folic acid is linked to neural tube differences.
- Maternal health conditions: Such as poorly controlled diabetes.
In many cases, the cause cannot be determined.
Risk Factors
- Family history of a congenital condition or genetic disorder
- Certain infections during pregnancy
- Alcohol use or some medications during pregnancy
- Low folic acid intake before and early in pregnancy
- Poorly controlled maternal diabetes
- Older parental age (for some conditions)
Diagnosis
Congenital anomalies may be found before birth, at birth, or later. Evaluation can include:
- Prenatal ultrasound: Imaging during pregnancy that can show many structural differences.
- Prenatal screening and diagnostic tests: Blood tests and, when indicated, sampling that checks for chromosomal conditions.
- Newborn examination and screening: Physical exam, hearing screening, and a blood spot test for certain conditions.
- Imaging and specialist tests: Echocardiograms, X-rays, or other studies based on the suspected anomaly.
Treatment
Treatment is tailored to the specific anomaly and its severity, and is often led by a team of specialists. Options can include:
- Surgery: To repair structural differences such as some heart defects or cleft lip and palate.
- Medications: To support organ function or treat related problems.
- Therapies: Physical, occupational, speech, or developmental therapy to support function and growth.
- Assistive devices: Hearing aids, braces, or other aids depending on the condition.
- Ongoing monitoring: Regular follow-up to track development and address new needs.
Many children do well with timely care, and support for families is an important part of treatment.
Prevention
- Take folic acid before and during early pregnancy as advised
- Avoid alcohol and only use medications cleared by a clinician during pregnancy
- Keep vaccinations and infections in check before and during pregnancy
- Manage chronic conditions such as diabetes before conceiving
- Attend recommended prenatal care and screening
- Consider genetic counseling if there is a family history
When to See a Doctor
Discuss any concerns about your baby's development, feeding, or breathing with your pediatric provider, and attend recommended screenings. Seek emergency care for a baby who:
- Is struggling to breathe or turning blue around the lips
- Is very floppy, unresponsive, or extremely difficult to wake
- Is not feeding and shows signs of dehydration
- Has a seizure
Frequently Asked Questions
What are congenital anomalies?
Congenital anomalies, also called birth defects, are differences in the structure or function of the body that are present at birth. They can affect many parts of the body and range from mild to serious.
What causes birth defects?
Many are caused by a mix of genetic and environmental factors, and in a lot of cases no single cause is found. Known contributors include genetic and chromosomal differences, certain infections, alcohol or some medications in pregnancy, and low folic acid.
Can congenital anomalies be detected before birth?
Many can. Prenatal ultrasound can show structural differences, and blood tests and other screening can check for some chromosomal conditions. Newborn examination and screening tests detect additional conditions after birth.
Can birth defects be prevented?
Not all can, but some risk can be lowered by taking folic acid, avoiding alcohol and unsafe medications in pregnancy, managing conditions like diabetes, and getting recommended prenatal care. Genetic counseling can help families with a known history.
Can children with congenital anomalies live full lives?
Many can, especially with timely treatment such as surgery, therapies, and ongoing care. Outcomes vary widely depending on the specific condition, and many children thrive with the right support.
References
- Centers for Disease Control and Prevention (CDC). Birth defects.
- World Health Organization (WHO). Congenital anomalies.
- MedlinePlus, U.S. National Library of Medicine. Birth defects.
- National Institute of Child Health and Human Development (NICHD).