Meckel syndrome 3 is a rare genetic condition that affects development before birth. Early signs of Meckel syndrome 3 often include changes in the brain and kidneys, and many babies also have extra fingers or toes. It is usually recognized during pregnancy or at birth, and the pattern is lifelong because it starts during fetal development. Not everyone will have the same experience, but Meckel syndrome 3 is often severe and many affected babies die before birth or soon after delivery. Treatment focuses on supportive care, comfort, and helping families understand the diagnosis and future pregnancy risks.
How many people live with Meckel syndrome 3?
No reliable worldwide or U.S. count of people living with Meckel syndrome 3 has been published. Meckel syndrome overall is reported to be very rare, with an estimated frequency of about 1 in 13,250 to 1 in 140,000 births worldwide (MedlinePlus Genetics, 2024), but no named source gives a separate global or United States number for the type 3 form, and because it usually causes death before or shortly after birth, living-population estimates are not routinely reported.
Overview
Meckel syndrome 3Symptoms
Meckel syndrome 3 causes severe birth defects, often recognized before birth or at delivery. Common features include kidney cysts, changes in brain development, and an extra finger or toe. Many babies also have liver scarring and underdeveloped lungs.
Outlook and prognosis
Meckel syndrome 3 is a very severe condition affecting development before birth. Most affected babies die during pregnancy or soon after delivery because the brain, kidneys, and other organs do not develop normally, so families need genetic support.
Causes and risk factors
Meckel syndrome 3 is caused by harmful changes in the TMEM231 gene. It follows an autosomal recessive inheritance pattern, so risk is highest when both parents carry the changed gene. Lifestyle or environmental factors do not cause Meckel syndrome 3.
Genetic influences
Genetics are central to Meckel syndrome 3. It is caused by disease-causing changes in a specific gene and is usually inherited in an autosomal recessive pattern, so both biological parents typically carry one altered copy.
Diagnosis
Doctors usually suspect Meckel syndrome 3 from clinical features seen before birth or at delivery. Ultrasound and sometimes MRI can show typical imaging findings. The genetic diagnosis of Meckel syndrome 3 is confirmed with genetic tests.
Treatment and drugs
Treatment for Meckel syndrome 3 focuses on comfort, feeding, breathing support, and careful management of kidney, liver, and brain problems. Some babies need intensive care soon after birth. Families are usually supported by genetics, newborn, and palliative care teams.
Symptoms
Meckel syndrome 3 usually affects several organs before birth, so the first signs are often seen on prenatal ultrasound rather than noticed later in childhood. The pattern can include brain changes, enlarged cystic kidneys, extra fingers or toes, and liver problems. Many of the early features of Meckel syndrome 3 are severe and can affect growth, breathing, and survival around the time of birth. Not every pregnancy shows the same findings, but this condition is typically serious.
A sac-like opening at the back of the head, called an encephalocele, is one of the most common signs. Babies with Meckel syndrome 3 may also have other brain development differences that can affect basic body functions.
The kidneys are often much larger than usual and filled with many small cysts. This can reduce kidney function before birth and may lower the amount of amniotic fluid around the baby.
Some babies have extra fingers or extra toes, most often on the outer side of the hands or feet. This may be easy to see on ultrasound or at birth and is a classic feature of Meckel syndrome 3.
The liver may develop abnormal bile ducts and scarring, a problem doctors call fibrosis. Even when it is not obvious on an early scan, it is part of the typical pattern in Meckel syndrome 3.
How people usually first notice Meckel syndrome 3?
Meckel syndrome 3 is usually first noticed before birth, often during a prenatal ultrasound, when doctors see a combination of major structural differences such as kidney enlargement from many cysts, changes in the brain at the back of the skull, and extra fingers or toes. In some pregnancies, genetic testing helps confirm the diagnosis after these findings appear, especially if there is a family history or earlier testing raises concern. Because this is a severe condition that begins during fetal development, the first signs of Meckel syndrome 3 are most often recognized by the medical team during pregnancy rather than by symptoms a baby later reports.
Types of Meckel syndrome 3
No distinct types of Meckel syndrome 3 are widely recognized.
Can I slow down the onset of symptoms?
No, there is no evidence that lifestyle changes or medical treatment can meaningfully delay the start of symptoms in Meckel syndrome 3, because this is a rare inherited condition that begins to affect a baby very early in pregnancy. Diet, exercise, sleep, vitamins, or other everyday health steps have not been shown to prevent the condition or slow it once a pregnancy is affected, although research is still looking at how the gene changes cause the condition. If this runs in your family, genetic counseling and carrier or pregnancy testing can help you understand the risk early, and while that does not treat or delay the condition, it can help you make informed choices and plan next steps.
What genetics can tell you about symptoms
Genetics can explain why Meckel syndrome 3 can look somewhat different from one baby to another, even though the condition usually causes a similar pattern of severe problems before birth, including changes in the brain, kidneys, and often extra fingers or toes. Different disease-causing changes in the same gene can sometimes influence which features are most noticeable and how severe they are, but this condition is generally serious in all known cases. Genetics may also help confirm the diagnosis and explain why the condition starts during fetal development, rather than later in childhood or adulthood.
Causes and risk factors
For families thinking about future pregnancies, the main cause of Meckel syndrome 3 is an inherited change in the TMEM67 gene. A baby usually develops Meckel syndrome 3 only when both parents carry and pass on the same changed gene, so family history and carrier status are the main risk factors. The chance is higher when parents are related by blood, such as cousins, or when they have had a previous pregnancy affected by Meckel syndrome 3. There are no known lifestyle choices or everyday environmental exposures that cause this condition, although those factors can affect when it is found during pregnancy. Genetic testing can sometimes clarify your personal risk.
What are the most common causes or risk factors?
Meckel syndrome 3 is mainly caused by an inherited change in a gene, most often a gene called TMEM67, that disrupts very early development before birth. The biggest risk factors are a family history of the condition, having had a child with it before, or both parents carrying the same changed gene; the chance is also higher when the parents are blood relatives, such as cousins. There are no known lifestyle or environmental causes, so it is not caused by anything a parent did or did not do during pregnancy.
Environmental and biological risk factors
For Meckel syndrome 3, no clear environmental or body-based factors have been shown to raise the chance of the condition on their own. Current evidence has not identified well-established outside exposures, maternal health factors, or other noninherited biological influences that reliably explain why it occurs. Researchers are still studying early pregnancy and developmental factors, but no confirmed environmental or biological risk factors are recognized at this time.
Genetic risk factors
For families facing a pregnancy affected by Meckel syndrome 3, one of the hardest questions is why it happened and whether it could happen again. When people ask about the genetic causes of Meckel syndrome 3, the main answer is harmful changes in a gene called TMEM67. Some risk factors are inherited through our genes, and this is not caused by anything parents did or did not do. Meckel syndrome 3 is usually passed down in an autosomal recessive pattern, meaning a baby is affected only when both copies of TMEM67 are not working.
TMEM67 gene: Meckel syndrome 3 is linked to harmful changes in the TMEM67 gene. This gene helps cells use tiny structures that are important for normal development before birth.
Recessive pattern: Meckel syndrome 3 is usually inherited in an autosomal recessive pattern, which means a baby must inherit two nonworking copies of TMEM67 to be affected. When both parents are carriers, each pregnancy has a 1 in 4, or 25%, chance of Meckel syndrome 3.
Carrier parents: Parents who each carry one altered TMEM67 copy are usually healthy and may not know they are carriers. Because carriers often have no symptoms, Meckel syndrome 3 can appear unexpectedly in a family.
Family history: A previous pregnancy or child affected by Meckel syndrome 3 raises the chance of the same condition in a future pregnancy if both parents are carriers. A known TMEM67 change in close relatives can also point to higher inherited risk.
Related parents: When parents are biologically related, such as cousins, they are more likely to carry the same rare gene change. This increases the chance of autosomal recessive conditions, including Meckel syndrome 3.
Lifestyle risk factors
Meckel syndrome 3 is not caused by lifestyle habits, so there are no proven lifestyle risk factors that trigger the condition itself. In practice, how lifestyle affects Meckel syndrome 3 is mostly about whether added stresses during pregnancy worsen complications in an already severely affected fetus. Lifestyle measures cannot correct the underlying developmental problems, but they may influence pregnancy health, comfort, and supportive care decisions.
Alcohol does not cause Meckel syndrome 3, but it can add fetal stress and may worsen growth or brain development in a pregnancy already affected by major malformations. Avoiding alcohol helps reduce extra harm on top of the syndrome itself.
Smoking does not create the condition, but it can reduce placental blood flow and increase the risk of poor fetal growth or pregnancy complications. In an affected pregnancy, avoiding tobacco may help limit additional strain on the fetus and placenta.
Recreational drugs and non-prescribed substances do not cause Meckel syndrome 3, but they can increase the risk of miscarriage, poor growth, and unstable pregnancy course. Avoiding these substances is one of the clearest ways lifestyle can affect Meckel syndrome 3 outcomes during pregnancy.
Diet does not prevent or trigger Meckel syndrome 3, but poor maternal nutrition can weaken overall pregnancy health and recovery. A balanced diet supports the pregnant person's strength and may help with tolerance of complications such as nausea, anemia, or fluid shifts.
Risk prevention
Meckel syndrome 3 is a rare inherited condition that starts before birth, so there is no lifestyle change that can prevent the disorder itself once a pregnancy is affected. Prevention is mainly about understanding reproductive risk before or during pregnancy, especially for families with a known history of Meckel syndrome 3. Different people need different prevention strategies—there’s no single formula.
Meeting with a genetics specialist can help you understand the chance of Meckel syndrome 3 happening in a pregnancy. This is especially important if you, your partner, or a close relative has had an affected pregnancy or known gene change.
Blood or saliva testing may show whether both partners carry a gene change linked to Meckel syndrome 3. If both are carriers, each pregnancy has a higher chance of being affected.
A careful family history can sometimes uncover patterns such as repeated pregnancy losses, kidney cysts, or severe birth defects in relatives. That information can guide which genetic tests are most useful before pregnancy.
If there is a known family risk, planning before pregnancy gives more options and more time to think through them. This may include targeted genetic testing, counseling, and discussion of reproductive choices.
Can you prevent Meckel syndrome 3?
Meckel syndrome 3 cannot usually be prevented, because it is a rare inherited condition that happens when a baby receives certain gene changes from both parents. There is no proven way to stop it through diet, medicines, or lifestyle changes, and it is not caused by anything parents did or did not do during pregnancy. If this condition runs in your family, meeting with a genetics specialist before pregnancy may help you understand the risk and discuss testing and family-planning options.
Transmission
Meckel syndrome 3 is not infectious, so it cannot spread from one person to another through touch, the air, food, or close contact. It is a genetic condition that is passed from parents to a child at conception, not something you can catch later in life.
In most families, how Meckel syndrome 3 is inherited follows an autosomal recessive pattern, meaning a baby must receive one changed copy of the gene from each parent. The parents are often healthy carriers and may have no symptoms themselves. When both parents are carriers, each pregnancy has a 1 in 4, or 25%, chance of Meckel syndrome 3, a 1 in 2, or 50%, chance that the child will be a carrier, and a 1 in 4, or 25%, chance that the child will inherit neither changed copy.
When to test your genes
Consider genetic testing before pregnancy or early in pregnancy if Meckel syndrome 3 runs in your family, you and your partner are related by blood, or you have had a previous affected pregnancy. Testing can confirm carrier status and guide prenatal diagnosis, reproductive planning, and specialist care.
Diagnosis
Meckel syndrome 3 is usually diagnosed before birth or soon after delivery because it tends to cause a pattern of major structural differences that can be seen on scans and exams. Doctors look at the whole picture, including ultrasound findings, the baby’s physical features, and testing to confirm the cause. Getting a diagnosis is often a turning point toward answers and support. In many families, the genetic diagnosis of Meckel syndrome 3 is confirmed with specialized gene testing.
Pregnancy ultrasound often shows the first clues, such as kidney changes, brain differences, or extra fingers or toes. These findings can raise strong concern for Meckel syndrome 3, especially when several features appear together.
After birth, doctors examine the baby for the pattern of visible and internal features linked with this condition. The combination of findings matters, because no single sign on its own is enough to confirm the diagnosis of Meckel syndrome 3.
Imaging of the brain may be done during pregnancy or after birth to look for structural differences, including problems in the back part of the brain. These imaging findings help support the diagnosis and can also help rule out some other conditions.
Doctors look closely at the kidneys because they are often enlarged or develop multiple cysts in Meckel syndrome 3. Kidney imaging can help explain why the condition may affect growth, amniotic fluid levels, and survival around the time of birth.
How is Meckel syndrome 3 diagnosed?
Meckel syndrome 3 is usually suspected before birth when an ultrasound shows a typical pattern of severe problems, most often changes in the brain and skull, very enlarged kidneys with many fluid-filled sacs, and sometimes extra fingers or toes. After that, doctors may use a physical exam and imaging tests to confirm what they see, and genetic testing can help confirm the diagnosis by finding the related gene change, especially if there has been a previous affected pregnancy in the family.
Stages of Meckel syndrome 3
Meckel syndrome 3 does not have defined progression stages. This is because it is a very severe condition that develops before birth, rather than an illness that moves through clear step-by-step phases over time. Doctors usually find Meckel syndrome 3 during pregnancy or shortly after birth by looking at major physical changes on ultrasound, examining the baby, and sometimes using genetic testing to confirm how Meckel syndrome 3 is diagnosed. In some cases, family history can play a role in diagnosis.
Outlook and prognosis
The outlook for Meckel syndrome 3 is extremely poor, with most affected fetuses dying before birth or in the neonatal period because of severe brain, kidney, and other organ malformations. Among liveborn infants, survival is usually limited to hours, days, or only a few weeks, and long-term survival is exceptionally rare. Mortality is driven mainly by respiratory failure related to pulmonary hypoplasia, severe central nervous system abnormalities, and complications of cystic kidney disease. Families often ask about Meckel syndrome 3 life expectancy, and in most cases the condition is considered uniformly lethal in the perinatal period. Prognosis does not typically improve with intensive medical care because the underlying structural abnormalities are profound and multisystemic. For future pregnancies, genetic counseling is important because this autosomal recessive disorder carries a 25% recurrence risk for each pregnancy.
Long-term effects
Meckel syndrome 3 usually has a very poor outlook, and many affected pregnancies end before birth or shortly after delivery. When families ask about life expectancy in Meckel syndrome 3, the answer is that long-term survival is rare because the condition often affects several vital organs at once. In the uncommon cases where a baby lives longer, the long-term picture is often marked by major medical needs and severe developmental effects.
Meckel syndrome 3 often leads to miscarriage, stillbirth, or death around the time of birth. This happens because the brain, kidneys, lungs, and other organs may be affected very severely before delivery.
Many babies born alive with Meckel syndrome 3 survive only hours, days, or weeks. Serious problems with breathing, kidney function, or brain development are common reasons for this limited survival.
In the rare children who live longer, brain differences can lead to profound developmental disability. Some may never reach expected milestones such as head control, sitting, speaking, or independent movement.
Large cystic kidneys can cause severe kidney failure early in life. This can affect fluid balance, blood pressure, and overall growth, and it often adds to the poor prognosis.
How is it to live with Meckel syndrome 3?
Meckel syndrome 3 is an extremely severe genetic condition that usually causes major problems in development before birth, often affecting the brain, kidneys, and other organs so seriously that most affected babies die during pregnancy or shortly after birth. For families, the day-to-day reality is therefore less about long-term living with the condition and more about navigating a high-risk pregnancy, complex medical information, difficult decisions, and intense grief. It can deeply affect parents, siblings, and other loved ones, who may need emotional support, bereavement care, and genetic counseling to understand what happened and what it may mean for future pregnancies.
Treatment and drugs
Meckel syndrome 3 is a very severe inherited condition, and treatment is aimed at support and comfort rather than a cure. Because it usually causes major problems in the brain, kidneys, and other organs before birth, care often centers on close pregnancy monitoring, clear discussions with specialists, and planning for delivery and newborn care. Treatment often looks different for each person, but for many living with Meckel syndrome 3, doctors focus on breathing support, feeding support, and relief of discomfort if a baby is born alive. There are no medicines that can reverse Meckel syndrome 3 itself, and surgery or intensive care may help only in limited situations because the condition affects several vital organs at once. Families are also often offered genetic counseling to talk through future pregnancies, recurrence risk, and testing options.
Can you cure Meckel syndrome 3?
No, Meckel syndrome 3 cannot currently be cured. Treatment cannot fix the underlying problem, so care is mainly supportive and may include close monitoring during pregnancy, planning for delivery and newborn care, and genetic counseling to help families understand the condition and future pregnancy risks.
Non-drug treatment
Meckel syndrome 3 usually causes very serious problems before birth, so care often centers on comfort, careful pregnancy planning, and family support rather than a cure. Managing this condition often means working with a maternal-fetal medicine team, newborn specialists, and genetic counselors to make decisions that fit the pregnancy and the family’s wishes. Because many babies with Meckel syndrome 3 die before birth or shortly after delivery, non-drug care is mainly supportive and may change depending on what is seen on ultrasound and after birth.
Close prenatal monitoring with ultrasound helps track growth, kidney changes, and brain development, and it can guide delivery planning. For many, treatment begins not at the pharmacy, but with clear discussions about what the scans mean and what to expect.
A detailed delivery plan can help families prepare for comfort-focused care, neonatal support, or both, depending on the baby’s condition at birth. This is an important part of prenatal care for Meckel syndrome 3 and may include where delivery should happen and which specialists should be present.
If a baby is not expected to live long, palliative care focuses on warmth, gentle handling, feeding support when possible, and relief of distress. These approaches are part of care that supports both the baby and the family.
Babies who survive after birth may need help with breathing and safe feeding because of brain, kidney, or facial differences. Not every approach works the same way, and the care team may adjust support based on how stable the baby is.
Your genes may have an impact on how drugs work for you
Meckel syndrome 3 is a very severe condition present before birth, and there is no standard medicine that treats the condition itself, so genetic testing for this syndrome usually does not help doctors choose a drug. When medicines are used for comfort or to manage problems such as seizures or breathing-related distress, how well they work often depends more on the baby's overall health and on how the kidneys and liver are working than on the gene change linked to Meckel syndrome 3. In other words, for many living with this condition, day-to-day treatment decisions are usually based on symptoms and organ function, not on drug-response genetics.
Pharmacological treatments
For Meckel syndrome 3, there is no medicine that can correct the underlying genetic condition or reverse the major brain, kidney, and liver changes. In practice, supportive treatment for Meckel syndrome 3 is tailored to the baby’s needs, and many living with this condition need comfort-focused care rather than long-term drug treatment. When medicines are used, they are usually aimed at problems such as seizures, pain, breathing distress, or infection.
There is currently no approved drug that treats the root cause of Meckel syndrome 3. Medicines, if used, are supportive and depend on the baby’s symptoms and overall care goals.
If seizures occur, doctors may use medicines such as phenobarbital or levetiracetam to help control them. The choice depends on the baby’s age, stability, and how the seizures present.
Babies who are uncomfortable may be given acetaminophen or, in more severe distress, morphine. These drugs are used to ease pain and support comfort, especially when care is focused on quality of life.
If a baby develops a suspected or confirmed infection, antibiotics such as ampicillin and gentamicin may be used early. The exact antibiotic plan depends on where the infection is and how sick the baby is.
Genetic influences
For families affected by Meckel syndrome 3, questions about future pregnancies often come up quickly because this condition is inherited. Meckel syndrome 3 is caused by changes in a gene called TMEM67, which helps cells use tiny surface structures needed for normal development early in pregnancy. It follows an autosomal recessive pattern, meaning a baby develops the condition only if they inherit one changed copy of the gene from each parent. A carrier means someone has one changed copy of the gene and usually does not have symptoms. When both parents are carriers, each pregnancy has a 1 in 4, or 25%, chance of Meckel syndrome 3, a 1 in 2, or 50%, chance that the child will be a healthy carrier, and a 1 in 4, or 25%, chance that the child will inherit neither changed copy. Genetic counseling and testing can help families understand the genetic cause of Meckel syndrome 3 and what it may mean for future pregnancies.
Is Meckel syndrome 3 genetic?
Genetics are central to Meckel syndrome 3. It is caused by disease-causing changes in a specific gene and is usually inherited in an autosomal recessive pattern, so both biological parents typically carry one altered copy.
Having a genetic risk is not necessarily a diagnosis
Changes in genes are a normal part of human biology and are common across the general population. Most of these changes do not directly affect health and are simply part of natural human diversity. For many genes, having a change linked to a condition points to a possible association, not a certain diagnosis, especially when several genes and environmental factors are involved. In some situations, though, a single well-understood change in one specific gene can be enough to confirm a diagnosis.
Pharmacogenetics—how genetics influence drug effects
For families facing Meckel syndrome 3, treatment is usually centered on comfort, pregnancy care, and clear planning, rather than a medicine that changes the course of the condition. The genetic change behind Meckel syndrome 3 helps confirm the diagnosis, which can spare families from extra tests and help the care team focus on supportive care. At this time, there are no proven drugs designed to correct the underlying gene problem in Meckel syndrome 3, so genetic results usually do not determine a specific medication in the way they can for some other conditions. If medicines are used for symptom relief or supportive care, doctors choose them based mainly on the baby’s overall condition and how well organs such as the kidneys and liver are working, because those problems can affect how the body handles drugs. In practice, genetic testing for Meckel syndrome 3 is often most helpful for guiding prognosis, discussing care goals, and helping parents understand recurrence risk and options in future pregnancies.
Interactions with other conditions
In day-to-day care, Meckel syndrome 3 is less about one disease triggering another and more about several serious body problems happening together before birth. Many babies affected have major changes in the brain and kidneys, and sometimes the liver and lungs are involved too, so these combined problems often shape the pregnancy and newborn period far more than separate illnesses would. Certain diseases may overlap, meaning Meckel syndrome 3 can resemble other rare inherited conditions that affect early development, especially conditions that can look like Meckel syndrome 3 before birth on an ultrasound. This is why doctors often compare it with other syndromes that also cause kidney cysts, brain differences, or extra fingers and toes. In families who have had Meckel syndrome 3, genetic testing and careful prenatal follow-up can help sort out whether a future pregnancy is showing the same condition or a different but related disorder. Because Meckel syndrome 3 is usually severe from the start, the main medical concern is usually not later interactions with common diseases, but how its organ changes overlap and affect overall development.
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.
What other conditions can cause similar symptoms to Meckel syndrome 3?
Meckel syndrome 3 can look similar to trisomy 13 and some other rare inherited conditions, especially Joubert syndrome and Bardet-Biedl syndrome, because these can also cause changes in brain development, kidney cysts, liver problems, and extra fingers or toes. Doctors usually tell them apart by looking at the full pattern of findings on pregnancy scans or after birth, along with chromosome and gene testing.
History
Families and communities once noticed patterns of severe birth differences that affected more than one pregnancy, even long before medicine had a clear name for them. What is now called Meckel syndrome 3 became recognized through these repeated observations and later through careful medical descriptions of babies who had a similar group of serious developmental problems before birth or at delivery. For many families, this history helps explain why the condition may come up during pregnancy care rather than later in childhood.
Early reports focused on the visible features doctors could see, such as changes in brain development, kidney problems, and extra fingers or toes. At first, these cases were grouped with closely related conditions, and the language used in older records was not always consistent. As medical science evolved, Meckel syndrome 3 came to be understood as part of a broader Meckel syndrome group, with doctors recognizing that similar findings could appear in slightly different forms from one pregnancy to another.
Later, improvements in ultrasound made it easier to spot the condition before birth, sometimes during routine scans when a pregnancy seemed to be progressing normally. This changed day-to-day care in an important way: instead of the diagnosis being made only after delivery, many living with the risk of Meckel syndrome 3 could get earlier information, counseling, and support while still pregnant. Researchers later identified a genetic cause for this form of Meckel syndrome, which helped confirm that it belonged within the larger Meckel syndrome family, but the condition’s history began with careful observation of recurring patterns.
Today, the history of Meckel syndrome 3 is closely tied to advances in prenatal imaging, pathology, and genetics. Not every early description was complete, yet together they built the foundation of today’s knowledge. Knowing this background can make discussions about the early symptoms of Meckel syndrome 3, prenatal testing, and family planning feel a little less confusing, especially during an already stressful time.