Your Baby's First Month
A caring, practical guide to your newborn's first days and weeks with Down syndrome.
Birth through 1 month | Medical care, feeding, family support, and next steps
Your baby's arrival is the beginning of a relationship that is entirely your own. You may be feeling love, excitement, uncertainty, or several emotions at once. Whatever these first days look like for your family, you deserve clear information and thoughtful support.
Babies with Down syndrome benefit from some additional medical evaluations soon after birth. Most of these are checks your baby's healthcare team can organize with you, one step at a time.
Quick Answer: What Does My Newborn Need?
Your baby's first priorities include checking the heart, reviewing blood and thyroid screening, assessing hearing and feeding, and planning follow-up care. Some evaluations are recommended even when your baby appears healthy.
You do not need to arrange everything alone. Your pediatrician and newborn team can help coordinate the appropriate tests and referrals.
Key Takeaways
- Every newborn with Down syndrome should have a postnatal echocardiogram.
- A complete blood count with differential is recommended within the first 3 days of life to assess for transient abnormal myelopoiesis (TAM).
- Thyroid screening, hearing evaluation, and careful feeding assessment are important.
- Green vomiting, breathing difficulty, and fever in a newborn require urgent attention.
- Early intervention referrals can begin before developmental concerns are apparent.
1. Your Baby's Heart
Congenital heart differences occur more often in babies with Down syndrome. Some are small, while others require close follow-up or treatment.
The American Academy of Pediatrics recommends a postnatal echocardiogram for every newborn with Down syndrome, even if prenatal ultrasound or fetal echocardiography did not identify a heart problem.
An echocardiogram uses ultrasound to look at the structure and function of the heart. It is painless and does not involve radiation.
Ask Before Going Home
Has my baby's echocardiogram been completed? What were the results? Does my baby need an appointment with a pediatric cardiologist?
Contact your baby's healthcare team promptly for persistent rapid breathing, sweating or tiring during feeds, poor weight gain, or other concerns about heart function.
2. Blood Screening in the First Days
Newborns with Down syndrome should have a complete blood count (CBC) with differential by 3 days of age.
This test helps identify blood cell abnormalities, including a condition called transient abnormal myelopoiesis (TAM). TAM is associated with Down syndrome and may occur even when a newborn looks well.
Some cases resolve without treatment, but others can cause serious complications. Babies diagnosed with TAM need an appropriate evaluation and follow-up plan, often involving pediatric hematology, because of the risk of later myeloid leukemia associated with Down syndrome.
What Parents Should Know
Most babies will not develop serious blood complications. The purpose of early testing is to identify concerns promptly rather than waiting for symptoms to appear.
3. Thyroid Screening
Thyroid hormone supports growth, metabolism, and brain development. Thyroid conditions are more common in children with Down syndrome.
Your baby's care team should review the newborn thyroid screening results and arrange additional testing when indicated. If the state newborn screen measures only thyroxine (T4), a thyroid-stimulating hormone (TSH) test is also recommended.
Even when newborn results are reassuring, ongoing thyroid monitoring remains important. TSH is generally rechecked at 6 months, 12 months, and annually afterward, or sooner when clinically indicated.
4. Hearing and Vision
👂 Hearing
Confirm that your baby has completed the newborn hearing screening. Babies who do not pass need prompt follow-up testing. Even when the newborn screen is normal, additional hearing assessment is recommended during infancy.
👁️ Vision
Your baby's newborn examination should include a red reflex assessment. An ophthalmology evaluation is recommended within the first 6 months of life.
Hearing and vision differences can affect communication and learning. Identifying concerns early helps your child receive appropriate support.
5. Feeding, Swallowing, and Growth
Some newborns with Down syndrome feed comfortably from the beginning. Others need extra support because of low muscle tone, difficulty maintaining a latch, fatigue, or problems coordinating sucking, swallowing, and breathing.
Breast milk or infant formula can provide appropriate nutrition. The important goal is safe, effective feeding and adequate growth, with a plan that works for your baby.
Signs Feeding May Need Evaluation
- Coughing, choking, or gagging during feeds
- Wet or congested breathing during or after feeds
- Frequent pauses, sweating, or unusual fatigue
- Feeds that routinely take an unusually long time
- Poor weight gain or reduced wet diapers
- Recurrent breathing problems or unexplained oxygen changes
Babies with Down syndrome may experience swallowing difficulties, including silent aspiration, in which milk enters the airway without obvious coughing. When feeding or respiratory concerns arise, your baby's clinician may recommend a specialized feeding evaluation or instrumental swallowing study.
Practical Feeding Support
Ask for help with positioning, latch, bottle flow, pacing, and feeding endurance. A lactation consultant or feeding specialist may be helpful. Do not thicken feeds or change nipple flow specifically to address suspected aspiration without guidance from your baby's care team.
6. Digestive Health
Certain digestive conditions, including duodenal obstruction and Hirschsprung disease, occur more frequently in babies with Down syndrome.
Your newborn team will assess feeding tolerance, abdominal appearance, vomiting, and passage of stool.
Emergency: Green Vomiting
Green (bilious) vomiting in a newborn is an emergency. It can indicate intestinal obstruction and requires immediate evaluation in an emergency department. Do not wait for a second episode.
A swollen abdomen, repeated vomiting, poor feeding, or delayed passage of meconium also warrants prompt medical assessment.
7. Safe Sleep and Breathing
Babies with Down syndrome follow the same safe sleep recommendations as other infants.
- Place your baby on their back for every sleep.
- Use a firm, flat, noninclined sleep surface with a fitted sheet.
- Keep pillows, loose blankets, toys, bumpers, and positioners out of the crib.
- Share your room, not your bed, ideally for at least the first 6 months.
- Avoid weighted sleep products and inclined sleepers.
Some babies with Down syndrome have differences in airway anatomy or muscle tone that can contribute to breathing difficulties. Report persistent noisy breathing, pauses in breathing, or feeding-related respiratory symptoms to your baby's pediatrician.
Before discharge, your baby's team should also complete the recommended car-seat tolerance screening and provide safe travel guidance.
8. Early Development and Intervention
Every baby develops at an individual pace. During the first month, your baby's important work includes feeding, sleeping, bonding, responding to familiar voices, and gradually becoming more alert.
Early intervention programs support development from birth through age 3. Depending on your baby's needs, services may include physical therapy, occupational therapy, speech-language support, and feeding therapy.
You do not need to wait until a delay becomes obvious to ask about a referral.
Simple Ways to Connect With Your Baby
- Hold your baby close and respond to their cues.
- Talk, sing, and make gentle eye contact.
- Offer supervised, awake tummy time in short sessions.
- Pause when your baby shows signs of fatigue.
- Celebrate small moments of connection.
9. Your Baby's First Appointments
Before leaving the hospital, ask for a written summary of completed tests, outstanding results, referrals, and follow-up appointments.
| Evaluation | Recommended Timing |
|---|---|
| Postnatal echocardiogram | Newborn period |
| CBC with differential | By 3 days of age |
| Thyroid screening review | Newborn period; additional TSH if indicated |
| Hearing screening | Before discharge, with follow-up as needed |
| Red reflex examination | Newborn examination |
| Feeding and swallowing assessment | Newborn period; further evaluation when indicated |
| Car-seat tolerance screening | Before hospital discharge |
| Pediatric follow-up | As directed at discharge, generally within the first few days |
| Ophthalmology evaluation | Within the first 6 months |
| Additional hearing evaluation | During infancy, generally around 6 months |
| TSH monitoring | 6 months and 12 months, then annually |
Timing may differ when a baby has symptoms, abnormal screening results, or other medical conditions. Your baby's healthcare team should individualize the follow-up plan.
10. When to Call and When to Seek Emergency Care
Contact Your Baby's Clinician Promptly
- Poor feeding or a noticeable decrease in intake
- Fewer wet diapers than expected
- Difficulty gaining weight
- Persistent coughing or choking with feeds
- Unusual sleepiness or reduced activity
- Persistent rapid breathing or sweating during feeds
- Increasing abdominal swelling or difficulty passing stool
Seek Immediate Medical Care
- A rectal temperature of 100.4°F (38°C) or higher in a baby younger than 3 months
- Green (bilious) vomiting
- Severe difficulty breathing
- Blue or gray lips or face
- Unresponsiveness or inability to wake normally
- Seizure-like activity
Call emergency services for severe breathing difficulty, blue or gray coloring, or unresponsiveness. A newborn with fever needs immediate medical evaluation, even if the baby otherwise seems comfortable.
11. Your First-Month Parent Checklist
- ☐ Echocardiogram completed and results reviewed
- ☐ CBC with differential completed by day 3
- ☐ Thyroid newborn screening reviewed
- ☐ Newborn hearing screening completed
- ☐ Red reflex examination completed
- ☐ Feeding safety and weight gain assessed
- ☐ Car-seat tolerance screening completed
- ☐ Pediatric follow-up appointment arranged
- ☐ Specialist referrals arranged when needed
- ☐ Early intervention referral discussed
- ☐ Copies of test results and discharge records obtained
- ☐ Family support resources identified
This checklist is a conversation tool, not a substitute for your baby's individualized discharge plan.
Dr. G's Pearl
During my years caring for newborns, I learned that parents often remember far more than the medical details of those first days. They remember the first time their baby held their finger, the quiet moments together, and the people who helped them feel supported.
Your baby is not a checklist of tests or appointments. Those evaluations matter, but so does simply being together, learning your baby's expressions, and discovering who your child is.
You do not have to understand everything about Down syndrome today. One day, one question, and one milestone at a time is enough.
— Dr. G, Board-Certified Pediatrician
12. Trusted Family Resources
Connecting with other families and established support organizations can make the early months feel less isolating. These organizations provide educational information, community connections, and practical resources.
What Comes Next?
As your baby moves beyond the newborn period, regular health monitoring, early intervention, feeding support, and developmental activities continue to be important.
Our next guide follows your baby through the rest of the first year, with practical information for ages 1–12 months.
Medical References
- Bull MJ, Trotter T, Santoro SL, et al. Health Supervision for Children and Adolescents With Down Syndrome. Pediatrics. 2022;149(5):e2022057010. AAP Clinical Report .
- American Academy of Pediatrics. Safe Sleep Recommendations. HealthyChildren.org .
- Centers for Disease Control and Prevention. Early Intervention. CDC .
Medical Disclaimer: This guide provides general educational information for families of newborns with Down syndrome. It does not replace medical evaluation, diagnosis, or individualized recommendations from your baby's pediatrician and specialists. Seek immediate medical care for emergency warning signs.
Written for Pediatric Parent Guide by Dr. G, Board-Certified Pediatrician. Final clinical review and link verification should be completed before publication.