Pregnancy is filled with conversations about health. Families learn about prenatal vitamins, genetic screening, ultrasounds, family medical history, delivery plans, and the tests their newborn may receive after birth. But one inherited condition that many families have never heard of is G6PD deficiency (G6PDdf)
At the G6PD Deficiency Foundation, we believe perinatal health provides an important opportunity to bring G6PD awareness into the conversation earlier. For years, much of the discussion surrounding G6PD deficiency has understandably focused on newborns. Early identification is especially important because G6PDdf can contribute to severe neonatal jaundice, and families may otherwise have no idea their baby has the condition. But awareness does not have to begin after delivery.
Learning about family history, understanding how G6PD deficiency is inherited, discussing testing with healthcare providers, and preparing for newborn screening can all begin during pregnancy. Starting earlier gives expecting families time to ask questions and understand why their baby’s G6PD status may matter.
What Does Perinatal Health Mean?
The word “perinatal” generally refers to the period surrounding pregnancy and birth. In healthcare, the exact time period included can vary depending on the context, but the broader conversation centers on the health of pregnant people and babies during pregnancy, around delivery, and shortly afterward.
This makes perinatal health an important setting for education about inherited conditions.
Pregnancy often prompts families to think about health information they may never have considered before. Has anyone in the family had a genetic condition? Is there a history of unusual anemia? Did a relative experience severe newborn jaundice? Has someone previously been diagnosed with G6PD deficiency?
Those questions can provide valuable information to share with an obstetrician, pediatrician, genetic counselor, or another qualified healthcare professional.
G6PDdf is inherited. It is not something a baby develops because of something a parent did during pregnancy. Understanding that distinction can help families approach testing and screening as tools for gaining knowledge rather than sources of fear.
Understanding G6PD Deficiency
Glucose-6-phosphate dehydrogenase is an enzyme that helps protect red blood cells against oxidative stress. People with G6PDdf have reduced activity of this enzyme, which can leave their red blood cells more vulnerable to damage under certain circumstances.
Many people with the deficiency experience no obvious symptoms in everyday life and may not even know they have it. Problems can occur when someone encounters certain oxidative triggers. These can include specific medications, fava beans, infections, and other exposures.
When enough oxidative stress occurs, red blood cells can break down faster than the body can replace them. This process is called hemolysis and can result in hemolytic anemia.
In newborns, one of the most significant concerns is jaundice. G6PD deficiency is a recognized risk factor for neonatal hyperbilirubinemia. When bilirubin reaches dangerously high levels and is not appropriately managed, severe neurological complications such as kernicterus can occur.
This connection between G6PDdf, jaundice, and newborn health is one reason the Foundation has worked extensively to increase awareness of newborn G6PD screening.
Why Talk About G6PD During Pregnancy?
Bringing G6PD into perinatal health conversations does not mean that every pregnant person or fetus automatically needs specialized testing. Instead, it means families should have the opportunity to learn about the condition and discuss their individual circumstances with healthcare professionals.
Pregnancy provides time to investigate family history and determine whether a parent already knows their G6PD status. If there is a known family history, a healthcare professional may recommend additional discussion, testing, or genetic counseling.
The G6PD gene is located on the X chromosome, giving the condition a distinctive inheritance pattern. A male has one X chromosome, while a female generally has two. The Foundation explains that a male with a G6PD variant on his X chromosome is deficient, while females can have different levels of G6PD activity depending on the variants they inherit and X-chromosome inactivation.
This also means women should not automatically be viewed as unaffected carriers. Some heterozygous females can have clinically meaningful deficiency and may be susceptible to the same types of oxidative triggers.
Understanding a parent’s status can therefore provide useful information about both their own health and the possibility of passing a G6PD variant to a child.
Family History Can Start the Conversation
You do not need to arrive at a prenatal appointment knowing everything about your family’s genetics. Simply sharing what you do know can help your healthcare team determine whether additional conversations would be useful.
Families may want to consider whether there is a known history of:
- G6PD deficiency
- Significant newborn jaundice
- Unexplained episodes of anemia
- Reactions associated with certain medications or fava beans
- A relative who has previously received a G6PD diagnosis
Family history alone cannot diagnose G6PDdf. It can, however, provide a reason to discuss testing with a healthcare professional.
The Foundation notes that when a child is diagnosed, screening parents and siblings may be desirable because the condition is inherited and other family members may be unaware that they have it.
What Does G6PD Testing Actually Involve?
Testing is an area where clear terminology is especially important.
The Foundation explains that G6PD screening can involve measuring G6PD enzyme activity in a blood sample or looking for variants in the G6PD gene. Different methods have different strengths and limitations.
A quantitative enzyme assay measures enzyme activity in red blood cells. Molecular testing looks for genetic variants associated with the deficiency. The Foundation also highlights an important challenge in testing females: some qualitative screening methods can miss heterozygous females whose overall enzyme activity does not fall below the test’s threshold.
For expecting families, testing before birth may first mean determining whether a parent has G6PD deficiency or a relevant G6PD variant. Depending on personal and family history, a healthcare professional or genetic counselor can help determine whether additional testing is appropriate.
Testing the fetus itself is a different matter. Prenatal diagnostic genetic testing generally requires specialized testing of fetal cells obtained through procedures such as chorionic villus sampling or amniocentesis. These procedures are not the same as routine maternal blood screening and carry considerations that should be discussed with an obstetrician or genetic counselor.
G6PD testing of a fetus is not a routine recommendation for every pregnancy. The decision to pursue prenatal diagnostic testing for a specific inherited condition depends on individual circumstances, known genetic information, and professional medical guidance.
That distinction matters. Earlier awareness is valuable, but medical testing should always be appropriate to the individual pregnancy.
Genetic Counseling Can Help Families Understand Risk
Genetics can become confusing quickly, particularly with an X-linked condition.
A genetic counselor can review personal and family medical history, explain inheritance, discuss available testing options, and help families understand what different results may mean.
The American College of Obstetricians and Gynecologists notes that carrier screening and genetic risk assessment can take place before or during pregnancy. When a known genetic condition exists in a family, discussing that history with an obstetrician or genetic counselor can help families understand their options.
For G6PD deficiency specifically, a conversation might begin with a simple statement such as, “G6PD deficiency runs in my family. Should I be tested?”
That one question can open the door to a much more informed discussion.
Earlier Knowledge Can Help Families Prepare
One of the greatest benefits of incorporating G6PD awareness into perinatal health education is preparation.
Learning that G6PDdf may be relevant before delivery gives families time to educate themselves. They can learn what the condition is, understand why newborn jaundice deserves careful attention, discuss newborn screening with their baby’s healthcare team, and learn what questions to ask before leaving the hospital.
Preparation can also help parents understand that a baby with G6PDdf may initially appear completely healthy.
The G6PD Deficiency Foundation emphasizes that many people with the condition show no apparent harm unless exposed to certain triggers. In newborns, however, severe hyperbilirubinemia can develop soon after birth. This is why our foundation advocates identifying G6PD deficiency before a newborn leaves the birthing facility when testing is indicated or available.
Knowing about a potential risk before birth can give parents time to discuss a plan rather than first learning about the condition during a stressful medical situation.
Why Newborn Screening Still Matters
Talking about G6PD during pregnancy is not a replacement for newborn screening, but it does complement it.
Newborn G6PD screening generally involves testing a small blood sample to measure enzyme activity, and in some circumstances genetic testing may also be used. If a screening result is out of range, additional testing may be needed.
Our Foundation recommends quantitative testing to identify G6PD deficiency in newborns and emphasizes the importance of identifying affected babies before discharge from the birthing facility. The goal is to allow high-risk infants to be monitored appropriately while also giving families important education before they go home.
Availability and policies surrounding G6PD newborn screening vary by location. Families should therefore ask their hospital, pediatrician, or state newborn screening program whether and under what circumstances G6PD screening is performed.
The broader goal is not to assume every baby has G6PD deficiency. It is to prevent families from remaining unaware when information could help guide monitoring and care.
What Expecting Families Can Do
Adding G6PD awareness to a perinatal health plan does not need to be complicated. It begins with information and conversation.
Expecting parents can ask whether G6PD deficiency is known in either family. If it is, they can tell their prenatal healthcare provider. A person who does not know their own G6PD status can ask whether testing is appropriate. Families can also discuss what newborn screening will be performed after delivery and whether G6PD testing is included or recommended.
If testing identifies G6PD deficiency, families can begin learning about the condition before they encounter an emergency.
They can also make sure pediatricians and other healthcare providers know the baby’s status. As the child grows, that information remains important because certain medications, foods, and illnesses can precipitate hemolysis in susceptible individuals.
G6PD deficiency is lifelong. Awareness should be, too.
Pregnancy Is Also About the Mother’s Health
Much of the discussion surrounding G6PD deficiency and pregnancy focuses understandably on the baby, but pregnant people who themselves have G6PD deficiency should also keep their own status in mind.
We advise people who are pregnant or breastfeeding and G6PD deficient to remain mindful of G6PD triggers.
A pregnant person who knows they have the deficiency should make sure their obstetric and other healthcare providers are aware. Medication decisions during pregnancy already require careful consideration, and G6PD status adds another piece of relevant medical information.
No one should stop, start, or change a prescribed medication solely based on information found online. Questions about medication safety during pregnancy and G6PD deficiency should be discussed with qualified healthcare professionals who can evaluate the individual’s complete medical situation.
From Pregnancy to Birth and Beyond
The value of perinatal health education is that it encourages families and healthcare professionals to think about the entire journey rather than one isolated moment.
During pregnancy, families can learn about G6PD deficiency, review family history, and discuss testing.
Before delivery, they can ask about the hospital’s newborn screening practices.
After birth, appropriate screening and bilirubin monitoring can help identify concerns that require follow-up.
Once a diagnosis is known, parents can learn about potential triggers and make sure the child’s healthcare providers are aware of the condition.
The process can be thought of simply:
- Pregnancy → Learn and Ask
- Birth → Communicate
- Newborn Period → Screen and Monitor
- Beyond → Educate and Advocate
Each stage builds on the one before it.
Awareness Does Not Mean Alarm
Pregnancy already comes with an enormous amount of information. Introducing another genetic condition should not be about creating unnecessary fear.
Most people with G6PD deficiency can live healthy lives. Many never experience serious complications when they understand the condition and avoid relevant triggers.
The purpose of awareness is knowledge.
Knowing about an inherited condition before a problem occurs gives families an opportunity to ask questions. Knowing family history gives healthcare professionals more context. Knowing a baby’s G6PD status can help guide education and appropriate monitoring. Knowing the condition is lifelong helps families continue communicating that information as a child grows.
That is why earlier conversations can be valuable even when no immediate medical intervention is necessary.
Building a Broader Conversation About G6PDdf
For years, the Foundation has worked to increase awareness of G6PD deficiency and advocate for improved newborn screening. Expanding that conversation into pregnancy is a natural extension of the same goal.
Perinatal health creates an opportunity to reach families before their newborn leaves the hospital. It allows expecting parents to learn about inheritance, ask whether they should know their own status, and understand why newborn G6PD screening may matter.
It can also help healthcare professionals recognize when family history or other factors warrant a closer conversation.
This does not mean that every family needs the same testing plan. Individual medical decisions belong between patients and qualified healthcare professionals. What every family can benefit from, however, is access to accurate information.
Start the G6PDdf Conversation Before Birth
G6PD deficiency is inherited, lifelong, and often silent until an individual encounters a trigger. For newborns, the association with severe jaundice makes early identification especially important. Including G6PD education in perinatal health conversations gives families another opportunity to prepare.
Learn your family history. Know your own status when appropriate. Tell your healthcare team if G6PD deficiency runs in your family. Ask about testing options. Find out what newborn screening is available where your baby will be born. And continue the conversation after delivery.
The goal is not to replace newborn screening with prenatal testing. It is to connect pregnancy education, family history, appropriate testing, newborn screening, and lifelong awareness into one more informed approach.
When families have information earlier, they have more time to learn what that information means and how to use it. We will continue working to educate families and healthcare professionals about G6PD deficiency, screening, and the importance of knowing your status.
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