GER: Understanding Reflux in Premature Babies
What Is GER?
GER (Gastroesophageal Reflux) occurs when milk or stomach contents flow backward from the stomach into the esophagus, the tube connecting the mouth to the stomach.
GER is common in infants, including premature babies.
You may hear your baby's NICU team refer to GER simply as reflux.
Sometimes reflux causes visible spit-up, while other times stomach contents move into the esophagus without coming out of the mouth.
Why Is Reflux Common in Premature Babies?
Several factors make reflux common in newborns.
Immature digestive system: The muscles and digestive processes involved in feeding are still developing.
Lower esophageal sphincter: The muscle between the esophagus and stomach may relax temporarily, allowing stomach contents to move backward.
Liquid feedings: Babies receive an entirely liquid diet.
Frequent feedings: Newborns eat frequently, which means their stomachs are often relatively full.
Time spent lying down: Babies spend much of their time in a horizontal position.
Reflux often improves as babies grow and their digestive systems mature.
What Are the Signs of Reflux?
Common signs may include:
Spitting up milk after feedings
Milk coming from the mouth or nose
Occasional swallowing or gulping between feedings
Regurgitation without visible spit-up
Some babies may appear uncomfortable around feedings, but behaviors such as crying, arching, or fussiness are not specific to reflux.
Many babies with GER are otherwise comfortable, feed well, and grow normally.
Is GER the Same as GERD?
No. There is an important difference.
GER (Gastroesophageal Reflux) describes the movement of stomach contents back into the esophagus. It is common and often a normal part of infancy.
GERD (Gastroesophageal Reflux Disease) occurs when reflux causes troublesome symptoms or complications, such as inflammation of the esophagus or feeding difficulties that affect growth.
Most babies who spit up do not have GERD.
Diagnosing GERD in premature infants can be challenging because many symptoms attributed to reflux have other possible causes.
Can Reflux Cause Apnea, Bradycardia, or Desaturations?
Parents may notice that their baby spits up around the same time as an apnea, bradycardia, or desaturation episode.
However, research has not established GER as a common cause of these events in premature infants.
Reflux should not automatically be assumed to be the cause of apnea, bradycardia, or oxygen desaturations.
If your baby experiences these episodes, the NICU team will evaluate other possible causes and determine whether additional monitoring or treatment is needed.
How Is Reflux Managed in the NICU?
For uncomplicated reflux, treatment usually focuses on feeding assessment and supportive care rather than medication.
Depending on your baby's individual needs, the NICU team may consider:
Reviewing feeding volumes
Adjusting feeding schedules or delivery rates
Evaluating feeding technique and coordination
Monitoring weight gain and overall feeding tolerance
Assessing for other medical causes of symptoms
Some NICUs use supervised positioning strategies for selected hospitalized babies. However, positioning that may be used under continuous NICU monitoring is not necessarily safe for home.
For sleep, babies should be placed flat on their backs on a firm, non-inclined surface unless their medical team has identified a specific exception.
Does My Baby Need Reflux Medication?
Most premature babies with uncomplicated GER do not need medication.
Acid-suppressing medications, such as proton pump inhibitors (PPIs) or H2 blockers, are not routinely recommended for premature infants.
These medications have not consistently demonstrated benefits for common symptoms attributed to reflux in this population and may increase the risk of certain infections and other complications.
Medication should only be considered when there is a clear medical indication and the potential benefits outweigh the risks.
Will My Baby Outgrow Reflux?
In most cases, reflux improves as babies mature.
As your baby's digestive system develops, feeding coordination improves, and they spend more time upright while awake, reflux often becomes less frequent.
The timing varies from baby to baby.
When Should Parents Be Concerned?
Although occasional spit-up is common, certain symptoms require medical evaluation.
Tell your baby's care team promptly if you notice:
Green or bile-stained vomiting
Blood in vomit or stool
Repeated forceful vomiting
Significant abdominal swelling
Poor weight gain or feeding refusal
Breathing difficulties or changes in your baby's medical condition
These symptoms should not automatically be attributed to reflux.
What Can Parents Do?
You can help by learning your baby's feeding cues and participating in feeding care.
Consider asking:
Is my baby's reflux considered normal for their age?
Is my baby gaining weight appropriately?
Could feeding volume or technique be contributing?
Are there other possible explanations for the symptoms?
What should we do at home if my baby continues to spit up?
Your NICU team can help you understand what is typical for your baby and when additional evaluation may be needed.
What Should Parents Know?
Reflux is very common in premature babies and usually improves with maturity.
Spitting up does not automatically mean your baby has a medical problem or needs medication.
The most important considerations are your baby's comfort, feeding effectiveness, growth, and overall health.
