Umbilical cord blood, once considered a medical waste, is now recognised as a valuable source. That’s because umbilical cord blood contains young stem cells that can support treatment for various blood and immune disorders in the future, making their collection and preservation an important consideration for expecting parents. That said, when parents explore cord blood banking, they typically have two main options: public banking and private banking, each offering distinct advantages and limitations. In this article, we’ll discuss how these choices differ and what they may mean for families. Let’s start by taking a closer look at what cord blood banking involves.
Cord Blood Banking: An Overview
Cord blood banking refers to the process of collecting and preserving stem cells from the umbilical cord immediately after a baby is born. The blood that remains in the umbilical cord and placenta contains cord blood stem cells, which can develop into different types of blood cells and immune cells. This is considered a once-in-a-lifetime opportunity, since this blood can only be collected at the time of birth and cannot be retrieved later.
To understand cord blood banking more clearly, it helps to first understand what stem cells are.
Stem cells
Stem cells are the body’s basic building blocks. They have two key abilities:
- Self-renewal: the ability to make copies of themselves
- Differentiation: the ability to develop into specialized cells in the body
Stem cells can come from several sources, such as:
- Bone marrow: One of the most established sources of stem cells used in transplantation, particularly for treating certain blood disorders and immune-related diseases.
- Peripheral blood: Stem cells can also circulate in the bloodstream and may be collected from a donor’s blood for transplantation.
- Umbilical cord blood: This is where umbilical cord blood stem cells are found. Collected immediately after birth, these stem cells primarily develop into blood and immune cells and are widely used in stem cell transplantation.
- Umbilical cord tissue: The tissue of the umbilical cord also contains stem cells known as umbilical cord stem cells. These are different from cord blood stem cells and are currently being studied for their potential applications in regenerative medicine.
Cord blood banking focuses on preserving these cord blood stem cells so they remain available for potential medical use in the future.
The process typically involves three main steps:
- Collection: After the baby is delivered and the umbilical cord is clamped and cut, the remaining cord blood is collected safely without affecting the mother or newborn.
- Processing: The collected blood is transported to a laboratory where the stem cells are separated and tested.
- Cryogenic storage: The processed cells are preserved at extremely low temperatures so they remain viable for many years.
Through this process, specialised cord blood banks preserve cord blood stem cells, ensuring they remain safely stored and accessible if needed in the future. Cord blood can generally be stored through two different models of banking: public banking and private banking. To understand how these options differ, let’s begin by looking at what public cord blood banking involves.
What is Public Cord Blood Banking?
Public cord blood banking allows parents to donate the cord blood collected at birth to a public stem cell bank. After collection, the cord blood containing cord blood stem cells is processed, tested, and stored in specialised facilities. These stored units are then listed in national or international donor registries so transplant centres can search for compatible matches when patients require stem cell transplantation.
Key aspects of public cord blood banking include:
-
- Voluntary donation: Parents choose to donate their baby’s cord blood to a public bank so it can become part of a shared medical resource.
- Registry-based access: Once stored, the umbilical cord blood stem cells are listed in donor registries that doctors use to find suitable matches for patients who need stem cell transplants.
- No cost for donation: In most cases, donating cord blood to a public bank does not involve processing or storage fees for the family.
- Health screening and eligibility: Public cord blood banks follow strict guidelines. Medical history reviews and screening tests are conducted to ensure the donated cord blood meets safety and quality standards.
- Quality standards for storage: Only cord blood units that meet specific volume, cell count, and safety criteria are preserved for potential transplant use.
- Donated cord blood units may be used for:
-
- Stem cell transplantation: Stored umbilical cord blood stem cells may be used to treat patients with certain blood disorders or immune-related conditions when a compatible match is identified, highlighting the broader benefits of preserving umbilical cord blood within public donor registries.
- Medical research: Units that do not meet transplant criteria may be used in approved scientific research aimed at improving stem cell therapies and transplantation practices.
What is Private Cord Blood Banking?
Private cord blood banking involves collecting and storing cord blood for the exclusive use of the child and their family. After the baby is born, the collected blood containing cord blood stem cells is processed and preserved in specialised storage facilities. Unlike public donation, the stored cells remain reserved for the family that chose to bank them.
Private banks preserve umbilical cord blood stem cells under long-term cryogenic storage so they remain available if they are ever needed for medical treatment.
Key aspects of private cord blood banking include:
- Family-exclusive storage: The stored cord blood stem cells are reserved only for the child and their family.
- Processing and storage fees: Families typically pay a one-time processing fee along with annual or long-term storage fees.
- Controlled access: The stored stem cells remain accessible to the family that banked them.
- Potential medical use within the family:
- For the child: In some cases, the stored stem cells may be used for the child if a stem cell transplant is required (autologous use).
- For siblings or relatives: The preserved umbilical cord blood stem cells may also be compatible with siblings or other family members and could potentially be used in an allogeneic transplant, reflecting one of the important umbilical cord blood preservation benefits when a suitable match exists within the family.
Key Differences Between Public and Private Cord Blood Banking
While both systems involve the preservation of cord blood stem cells, public and private cord blood banking operate under different models in terms of ownership, access, and purpose. The table below highlights the key structural differences between the two.
| Aspect | Public Cord Blood Banking | Private Cord Blood Banking |
| Ownership of stored stem cells | Once donated, the cord blood unit becomes part of a public bank and is no longer owned by the donating family. | The stored cord blood stem cells remain the property of the family that chose to bank them. |
| Access to the stored unit | Units may be accessed by any patient who is identified as a compatible match through transplant registries. | Access is restricted to the child and their family members. |
| Cost structure | Donation is typically free for parents, as processing and storage are funded by public health systems or research programs. | Families pay processing fees and ongoing storage costs to preserve the umbilical cord blood stem cells. |
| Availability through donor registries | Stored units are listed in national or international registries that transplant centers search when looking for compatible donors. | Privately stored units are not listed in public registries and remain reserved for family use. |
| Likelihood of personal access during medical need | The donating family usually cannot request or retrieve the donated unit if it has already been allocated to a patient or research. | The stored cord blood remains reserved for the family, allowing access if it is medically needed in the future. |
| Purpose of storage | Supports public health by increasing the availability of stem cell sources for patients who require transplants. | Preserves cord blood and stem cells for potential use by the child or compatible family members. |
Making an Informed Choice About Cord Blood Banking
When considering cord blood banking, it is important for families to understand the available options and what each approach involves. Learning about the benefits of preserving umbilical cord blood, along with the differences between public donation and private storage, can help parents weigh their options more thoughtfully. To gain a clearer understanding and decide what aligns best with their family’s priorities, parents may also consider speaking with reputable stem cell banking providers or healthcare professionals who can explain the options and guide them through the decision-making process.
