What Is Perinatal Pathology and How Can It Help Explain Pregnancy Complications?
Updated: Aug 24
Pregnancy complications can sometimes leave parents and doctors with difficult questions. Why did the baby have growth problems? What caused a pregnancy loss? Was there an issue with the placenta? Could the same problem happen in a future pregnancy?
Perinatal pathology can help answer some of these questions by examining the placenta, fetal tissues, membranes and other pregnancy-related specimens. The findings can provide important information about certain pregnancy complications, fetal conditions and pregnancy losses.
For parents who have experienced an unexplained pregnancy complication, understanding the role of perinatal pathology can help make medical reports and follow-up recommendations easier to understand.
What Is Perinatal Pathology?
Perinatal pathology is a specialised area of pathology that focuses on examining the placenta, fetal tissues, umbilical cord, membranes and other pregnancy-related specimens to investigate fetal and pregnancy complications.
The placenta is particularly important because it connects the mother and baby and supports the baby's oxygen and nutrient supply throughout pregnancy.
Changes in the placenta can sometimes be associated with conditions such as:
Fetal growth restriction
Preeclampsia
Placental insufficiency
Pregnancy loss
Stillbirth
Infections
Certain fetal complications
A pathological examination may help identify abnormalities that cannot always be recognised through ultrasound or clinical examination alone.
Why Is the Placenta Important?
The placenta performs several essential functions during pregnancy. It helps provide oxygen and nutrients to the fetus, removes waste products and plays an important role in hormonal and immune processes.
When the placenta does not function normally, fetal growth and pregnancy health may be affected.
Examining the placenta after a complicated pregnancy can sometimes provide clues about what happened.
However, it is important to understand that a placental examination does not always identify one definite cause of a complication. The findings need to be interpreted alongside the pregnancy history, ultrasound results, laboratory investigations and other clinical information.
When Is Perinatal Pathology Recommended?
Perinatal pathology may be considered in several situations, particularly when doctors need additional information about an adverse pregnancy outcome.
It may be recommended after:
Stillbirth
Unexplained pregnancy loss
Certain late pregnancy losses
Suspected placental abnormalities
Fetal growth restriction
Suspected fetal infection
Significant fetal structural abnormalities
Complicated multiple pregnancies
Other unexpected fetal or neonatal outcomes
The exact examination depends on the clinical circumstances and the type of specimen available.
How Can Perinatal Pathology Help After Pregnancy Loss?
Pregnancy loss can occur for many different reasons.
Potential contributing factors may include chromosomal abnormalities, placental disorders, infections, maternal medical conditions or fetal structural abnormalities.
Perinatal pathology may examine the placenta, membranes, umbilical cord and, where appropriate and with suitable consent, fetal tissues.
The findings may provide evidence of:
Placental inflammation
Infection
Abnormal blood flow or vascular changes
Placental injury
Other pathological abnormalities
These findings can then be reviewed with the clinical history and other investigations to determine whether a likely explanation can be identified.
The American College of Obstetricians and Gynecologists recommends placental examination as an important component of stillbirth evaluation.
Can Perinatal Pathology Explain Stillbirth?
Sometimes, yes.
A detailed examination of the placenta and fetal tissues may identify abnormalities that could have contributed to stillbirth.
However, not every stillbirth has an identifiable cause.
A complete stillbirth evaluation may include:
Review of maternal medical history
Pregnancy and delivery information
Examination of the placenta
Fetal examination when appropriate
Genetic testing
Microbiological investigations when clinically indicated
Using multiple sources of information can provide a more complete understanding of the pregnancy outcome.
What Does a Pathologist Examine?
Depending on the circumstances, a perinatal pathologist may assess different components of the pregnancy.
Placenta
The placenta may be examined for its size, shape, structure, blood vessels, areas of injury, inflammation and other abnormalities.
Umbilical Cord
The umbilical cord may be examined for abnormalities in its structure, blood vessels or attachment.
Fetal Membranes
The membranes surrounding the fetus can be assessed for evidence of inflammation or infection.
Fetal Tissue
In selected cases, fetal tissues may be examined to investigate structural abnormalities or other possible causes of pregnancy complications.
Additional genetic or molecular investigations may be considered depending on the clinical situation.
Can the Results Help With a Future Pregnancy?
One of the potential benefits of identifying a cause is that the information may help doctors plan care in a subsequent pregnancy.
For example, if the findings suggest a placental problem, your doctor may recommend closer monitoring of fetal growth or placental function during a future pregnancy.
If an infection, genetic condition or other medical issue is identified, additional testing or specialist care may be considered.
However, recurrence risk depends on the specific diagnosis. A pathology finding should therefore be interpreted by a qualified specialist rather than used to predict the next pregnancy independently.
Why Is Specialist Interpretation Important?
Pathology reports can contain complex medical terminology that may be difficult for parents to understand.
A fetal medicine specialist can review the report together with:
Ultrasound findings
Prenatal screening results
Genetic test results
Maternal health history
Previous pregnancy history
Pregnancy and delivery details
This multidisciplinary approach can help determine whether a pathology finding is clinically significant and whether it has implications for future pregnancy care.
Choosing Perinatal Pathology Services
If you need perinatal pathology, consider a healthcare team with experience in fetal medicine, obstetrics and pregnancy-related pathology.
Ideally, the fetal medicine specialist and pathologist should be able to communicate about the clinical circumstances and interpret the pathology findings in the appropriate context.
The goal should not simply be to produce a pathology report but to help parents and doctors understand what the findings mean.
Conclusion
Perinatal pathology can provide valuable information about pregnancy complications, fetal conditions and pregnancy loss. By examining the placenta, umbilical cord, membranes and, when appropriate, fetal tissues, it may help identify abnormalities that contributed to an adverse pregnancy outcome.
However, pathology is only one part of the overall evaluation. The most meaningful interpretation comes from combining pathology findings with ultrasound, genetic testing and the mother's medical and pregnancy history.
If you have experienced pregnancy loss or a significant pregnancy complication, discuss the available evaluation options with your obstetrician or fetal medicine specialist. Understanding what happened can sometimes provide important guidance for future pregnancy care.
Doctor’s Note
“After a pregnancy complication or loss, parents often want to understand why it happened and whether anything can be learned for a future pregnancy. Perinatal pathology, particularly detailed placental examination, can sometimes provide valuable clues. However, the pathology report should always be interpreted alongside the ultrasound findings, pregnancy history and genetic or laboratory investigations. Our aim is to bring these pieces of information together so that families receive a clear and meaningful explanation wherever possible.”
— Dr. Divya Ravikumar, MBBS, DNB (OG), MRCOG, PDF (Fetal Medicine), Fetal Medicine Specialist
FAQs
1. What is perinatal pathology?
Perinatal pathology is a specialised field that examines the placenta, fetal tissues, umbilical cord, membranes and other pregnancy-related specimens to investigate pregnancy complications, fetal abnormalities and pregnancy loss.
2. Can perinatal pathology determine the cause of pregnancy loss?
It can sometimes identify a likely cause or provide important clues, particularly when placental abnormalities, infection or fetal conditions are present. However, a definite cause cannot always be established.
3. What is examined during a placental pathology assessment?
A pathologist may examine the placenta's size, structure and blood vessels, along with the membranes and umbilical cord. Areas of inflammation, infection, injury or other abnormalities may also be assessed.
4. Can perinatal pathology help plan a future pregnancy?
Yes. If a specific condition or placental abnormality is identified, the findings may help your doctor determine whether additional monitoring or testing is appropriate during a future pregnancy.
5. Who interprets a perinatal pathology report?
A pathologist prepares the report, while an obstetrician or fetal medicine specialist can help interpret the findings in the context of the pregnancy history, ultrasound results, genetic tests and other clinical information.
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