The Extraordinary Science Hidden in an Ordinary Birth

Every day, thousands of babies are born around the world.

For most families, birth is the culmination of months of anticipation, preparation and hope. The first cry, the first cuddle and the first photographs quickly become treasured memories, while the umbilical cord, placenta, and surrounding birth tissues quietly fade into the background. Having fulfilled their role during pregnancy, they are often regarded as temporary organs that are no longer needed.

Yet modern science has revealed a remarkable reality.

The tissues that support life before birth are not simply biological waste. They contain diverse populations of stem cells and other specialised cells [1] that have already transformed the treatment of many serious diseases [3] and are now helping researchers explore entirely new approaches to medicine [2].

For expectant parents, understanding this science is becoming an increasingly important part of preparing for birth.

More Than Just Cord Blood

When people hear the term stem cell banking, they often think exclusively of umbilical cord blood. While cord blood is an incredibly valuable source of stem cells [3], it represents only one part of a much bigger biological picture [1,11].

Several birth tissues contain unique cell populations, each with different biological properties and potential medical applications [1].

Umbilical Cord Blood

Cord blood contains haematopoietic stem cells, the specialised cells responsible for producing all of the body’s blood and immune cells [3,4]. These are the stem cells that have been used in transplant medicine for more than three decades to treat around 80 established conditions [3,5], including certain blood cancers, inherited immune disorders, bone marrow failure syndromes and metabolic diseases [3].

Umbilical Cord Tissue

The umbilical cord itself contains Wharton’s jelly, a rich source of mesenchymal stem cells [1]. These cells are of considerable interest because of their ability to support tissue repair, regulate inflammation and influence the body’s natural healing processes [1,2].

The Placenta

For centuries, the placenta was viewed simply as the organ that nourished a developing baby during pregnancy. Today, researchers recognise it as one of the most biologically fascinating organs in the human body.

Different regions of the placenta contain distinct cell populations that differ in their biological properties and differentiation potential [1].

Maternal Placental Tissue

An area that many expectant parents have never heard of is maternal placental banking.

While many birth tissues originate from the baby, the maternal portion of the placenta (the decidua) also contains specialised cells. These maternal placental cells are now being studied for their own regenerative potential, expanding the scientific interest surrounding birth tissues beyond the baby alone [1].

The Amniotic Membrane

The thin membrane surrounding the baby during pregnancy contains epithelial and mesenchymal cells that have attracted growing interest in regenerative medicine [1]. The amniotic membrane is already used clinically in certain areas of medicine, including ophthalmology and wound management, because of its biological properties [1].

Together, these biological resources represent an extraordinary collection of specialised cells that exists for only a brief moment in a person’s lifetime [11].

Different Cells, Different Roles

It is easy to think of stem cells as one single type of cell.

Although we often talk about “birth stem cells” as a single group, they aren’t all the same. Stem cells from cord blood, cord tissue, the placenta and the amniotic membrane each have their own characteristics and are being studied for different areas of medicine [1].

Haematopoietic stem cells have an established role in rebuilding blood and immune systems following transplantation [3,4].

Mesenchymal stem cells are being investigated for their ability to influence inflammation, support tissue repair and communicate with surrounding cells through complex biological signalling [1,2].

Other specialised cell populations found within birth tissues also possess distinct biological properties that researchers continue to investigate as regenerative medicine develops [1].

Rather than one cell doing everything, scientists increasingly view birth tissues as a collection of complementary biological resources.

Why Scientists Value Birth Stem Cells

Scientists are interested in birth-derived stem cells not simply because they are stem cells, but because of the biological characteristics they possess [1].

Unlike cells collected later in life, birth stem cells are obtained at the very beginning of a person’s life, before ageing has influenced many of their biological characteristics [1]. Researchers believe this contributes to several characteristics that make them particularly valuable for both established treatments and emerging areas of regenerative medicine.

Many birth-derived stem cells have a remarkable capacity to multiply while retaining many of their biological characteristics, allowing scientists to expand cell populations for research and, in some cases, therapeutic applications [1].

Certain cell types, particularly mesenchymal stem cells found within cord tissue, the placenta and the amniotic membrane, are also known for their immunomodulatory properties [1]. Rather than simply replacing damaged cells, these cells can communicate with surrounding tissues by releasing signalling molecules that help regulate inflammation, support tissue repair and influence the body’s natural healing responses [1,2].

Researchers are also investigating the complex mixture of proteins, growth factors and extracellular vesicles released by these cells [1,2]. Increasing evidence suggests that many of the benefits observed in regenerative medicine research may result not only from the cells themselves, but from the biological signals they produce, which can encourage healing and influence the behaviour of neighbouring cells [1,2].

Another important advantage is that birth tissues can be collected without invasive procedures or risk to mother or baby when performed after delivery [1]. Instead of requiring surgery or bone marrow aspiration, these valuable biological resources are available during a process that is already taking place naturally.

Taken together, these characteristics help explain why birth-derived stem cells continue to attract scientific interest across so many areas of medicine. While much research remains ongoing, birth-derived stem cells have already established an important role in transplantation [3,5], while their unique biological properties continue to drive new avenues of regenerative medicine research [1,2].

Where Stem Cells Are Already Changing Lives

Discussions about stem cells often focus on future possibilities, but it is important to recognise that stem cell therapy is already an established part of modern medicine [3].

Since the first successful umbilical cord blood transplant in 1988, cord blood stem cells have been used worldwide to treat patients with serious blood disorders, immune deficiencies and inherited metabolic conditions [3].

For families affected by diseases such as leukaemia, lymphoma, sickle cell disease, thalassaemia, severe combined immunodeficiency (SCID) and certain inherited metabolic disorders, stem cell transplantation is not an experimental concept. It is an accepted medical treatment for over 80 conditions that has already changed thousands of lives [3,5].

This distinction matters.

The role of stem cell transplantation is well established in modern medicine. Increasingly, researchers are asking how the unique properties of different stem cell populations might help treat an even wider range of diseases.

The Next Chapter: Regenerative Medicine

If transplant medicine represents the present, regenerative medicine represents one of the most exciting areas of modern biomedical research.

Scientists around the world are investigating how birth-derived cells may support the repair of damaged tissues, regulate inflammation and influence healing in ways that were once thought impossible [1,2].

Current areas of research span neurological disorders, cardiovascular disease, diabetes, tissue repair, and a wide range of other medical conditions [6-9].

Some early clinical studies have produced encouraging results.

Other areas remain at an earlier stage of investigation.

This is exactly how scientific progress should work.

Each discovery builds on careful laboratory research, pre-clinical studies and clinical trials before becoming part of routine medical practice.

The excitement surrounding regenerative medicine is therefore matched by scientific caution. Promising early findings do not automatically become future treatments, and many questions still need to be answered through rigorous research.

A Unique Opportunity That Cannot Be Repeated

Unlike many medical decisions, birth presents a very narrow window of opportunity.

The stem cells found within cord blood and other birth tissues can only be collected at the time of birth. Once these tissues have been discarded, that opportunity is gone forever.

Expectant parents benefit from receiving accurate, evidence-based information about their options during pregnancy so they can make an informed decision before birth [12].

Donation, Banking and Informed Choice

Around the world, families have different options depending on where they give birth and the services available to them.

Some choose to donate cord blood to public banks, where it may one day help a patient requiring a stem cell transplant or contribute to medical research [10,12].

Others choose private banking, preserving their baby’s birth stem cells for potential future use by the child or, where clinically appropriate, a suitably matched sibling or family member [12].

Neither decision is universally right or wrong.

Every family brings different circumstances, medical histories and priorities to the conversation.

For some, a family history of conditions treated with stem cell transplantation may influence their decision.

For others, preserving access to a unique biological resource simply offers reassurance.

Families from underrepresented ethnic communities may also wish to consider that finding suitably matched unrelated stem cell donors can sometimes be more challenging because compatible tissue types may be less well represented within donor registries [13].

The most important outcome is not that every family reaches the same decision.

It is that every family has the opportunity to make an informed one.

Looking Towards Tomorrow

Birth has always marked the beginning of a new life.

Increasingly, it also represents the beginning of new scientific possibilities.

The tissues that were once routinely discarded are now helping researchers explore new approaches to regenerative medicine and develop new cell-based therapies.

The future of stem cell research is undoubtedly exciting.

It is also important to remain realistic.

Not every promising laboratory discovery becomes a successful medical treatment, and no responsible scientist can guarantee which therapies will become part of routine healthcare in the decades ahead.

What we do know is that birth offers a unique opportunity that cannot be recreated later.

Whether families choose public donation, private preservation or neither, understanding the science before that moment passes allows them to make a decision based on knowledge rather than uncertainty.

Perhaps that is the most extraordinary science hidden within an ordinary birth: not simply the remarkable cells themselves, but the possibility that something once overlooked may continue to shape the future of medicine for generations to come.

References

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[2] Caplan, A. I. (2017). Mesenchymal stem cells: Time to change the name! Stem Cells Translational Medicine, 6(6), 1445–1451. https://doi.org/10.1002/sctm.17-0051

[3] Ballen, K. K., Gluckman, E., & Broxmeyer, H. E. (2013). Umbilical cord blood transplantation: The first 25 years and beyond. Blood, 122(4), 491–498. https://doi.org/10.1182/blood-2013-02-453175

[4] Copelan, E. A. (2006). Hematopoietic stem-cell transplantation. New England Journal of Medicine, 354(17), 1813–1826. https://doi.org/10.1056/NEJMra052638

[5] Cord Blood Association. (2025, October). Cord blood fact sheet. AABB. https://www.aabb.org/docs/default-source/default-document-library/resources/cord-blood-fact-sheet.pdf

[6] Hussen, B. M., Taheri, M., Yashooa, R. K., Abdullah, G. H., Abdullah, S. R., Kheder, R. K., & Mustafa, S. A. (2024). Revolutionizing medicine: recent developments and future prospects in stem-cell therapy. International journal of surgery (London, England), 110(12), 8002–8024. https://doi.org/10.1097/JS9.0000000000002109

[7] Dehghani L, Owliaee I, Sadeghian F, Shojaeian A. The Therapeutic Potential of Human Umbilical Cord Mesenchymal Stromal Cells Derived Exosomes for Wound Healing: Harnessing Exosomes as a Cell-free Therapy. J Stem Cells Regen Med. 2024 May 31;20(1):14–23. doi: 10.46582/jsrm.2003003. PMID: 39044811; PMCID: PMC11262847. https://pmc.ncbi.nlm.nih.gov/articles/PMC11262847/

[8] Harris, V.K., Stark, J., Williams, A. et al. (2024) Efficacy of intrathecal mesenchymal stem cell-neural progenitor therapy in progressive MS: results from a phase II, randomized, placebo-controlled clinical trial. Stem Cell Res Ther 15, 151 (2024). https://doi.org/10.1186/s13287-024-03765-6

[9] Effects of the umbilical cord mesenchymal stem cells in the treatment of knee osteoarthritis: a systematic review and meta-analysis (2024). PubMed Central, PMC11575993. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11575993/

[10] Human Tissue Authority. (n.d.). What is umbilical cord blood banking? https://www.hta.gov.uk/guidance-public/umbilical-cord-blood-banking/what-umbilical-cord-blood-banking

[11] Weiss, M. L., & Troyer, D. L. (2006). Stem cells in the umbilical cord. Stem cell reviews, 2(2), 155–162. https://doi.org/10.1007/s12015-006-0022-y

[12] Waller-Wise R. (2022). Umbilical Cord Blood Banking: An Update For Childbirth Educators. The Journal of perinatal education, 31(4), 199–205. https://doi.org/10.1891/JPE-2021-0006

[13] Switzer, G. E., Bruce, J. G., Myaskovsky, L., DiMartini, A., Shellmer, D., Confer, D. L., Abress, L. K., King, R. J., Harnaha, A. G., Ohngemach, S., & Dew, M. A. (2013). Race and ethnicity in decisions about unrelated hematopoietic stem cell donation. Blood, 121(8), 1469–1476. https://doi.org/10.1182/blood-2012-06-437343