Saving cord blood means collecting the blood left in your baby’s umbilical cord after delivery and storing it so the stem cells inside can be used for medical treatment later. You have two main options: donating to a public bank at no cost or paying a private bank to store it exclusively for your family. Either way, the process requires planning well before your due date, because the collection happens in a narrow window right after birth.
Why Cord Blood Is Worth Saving
Cord blood contains a rich supply of blood-forming stem cells, the same type found in bone marrow. These cells can rebuild a patient’s blood and immune system after treatment for serious diseases. Cord blood stem cells are currently used to treat roughly 80 conditions, primarily blood and immune system disorders like sickle cell anemia, Fanconi anemia, thalassemia, and certain leukemias and lymphomas.
Beyond transplant medicine, clinical trials are exploring cord blood for conditions previously considered untreatable, including cerebral palsy, autism spectrum disorder, and traumatic brain injury. These uses are still experimental, but they’re driving growing interest in banking.
Public vs. Private Banking
This is the first decision you need to make, and it shapes everything else about the process.
A public cord blood bank works like a public blood bank. You donate your baby’s cord blood, give up ownership, and it becomes available to any patient worldwide who needs a stem cell transplant and is a match. Donation is free. Public banks are the backbone of the transplant system, and medical organizations generally encourage families to donate when possible. The downside is that you can’t retrieve the sample later if your own family needs it.
A private cord blood bank stores the sample exclusively for your family. You pay for collection, processing, and ongoing storage. The sample stays reserved for your child or a close relative. The trade-off is cost, and the realistic odds of ever using it are low. The American Academy of Pediatrics has estimated the likelihood of a child needing their own stored cord blood for transplant at roughly 1 in 200,000, partly because doctors are often reluctant to transplant a patient’s own cord blood back to them if it carries the same genetic defect that caused their disease. Private banking makes more financial and medical sense if you have an older child or family member with a condition already known to be treatable with a cord blood transplant.
What Private Banking Costs
Private banking involves two costs: an upfront processing fee and an annual storage fee that continues for as long as you keep the sample banked. Pricing varies by company, but to give you a concrete example, one of the larger U.S. banks (Cryo-Cell) lists a starting price around $845 for standard cord blood processing with a promotional discount, or roughly $1,195 for a premium service that uses a more advanced processing method. Adding cord tissue storage (the tissue of the cord itself, which contains a different type of stem cell) runs the total to approximately $1,600 to $1,950.
After that first year, you’ll pay an annual storage fee. At the same bank, that’s $199 per year for cord blood alone or $398 if you’re also storing cord tissue. Over 18 years, the storage fees alone add up to roughly $3,600 to $7,200, on top of the initial processing cost. Some banks offer prepaid plans for 18 or 20 years at a discount.
When to Start Planning
Don’t wait until the third trimester to start thinking about this. The Health Resources and Services Administration recommends beginning the process between your 28th and 34th week of pregnancy, about three months before your due date. That timeline gives you enough room to choose a bank, complete the paperwork, receive a collection kit (for private banking), and coordinate with your delivery team.
For public donation, not every hospital participates. You’ll need to confirm that your hospital has a partnership with a public cord blood bank. If it doesn’t, some public banks accept mail-in donations, but this requires advance coordination and a shipping kit. For private banking, the bank will mail you a collection kit that you bring to the hospital on delivery day.
How Collection Works
The collection itself is painless for both you and your baby. It happens after the baby is born and the umbilical cord has been clamped and cut, using blood that would otherwise be discarded with the placenta.
There are two approaches. In the more common method, called in-utero collection, the cord is clamped and cut normally right after delivery. While the placenta is still inside, a trained collector cleans the surface of the cord and inserts a sterile needle. Blood flows by gravity into a collection bag positioned below the placenta. The whole process typically takes less than 10 minutes and doesn’t interfere with delivery or bonding.
The second method, ex-utero collection, happens after the placenta is delivered. A collection specialist takes the placenta to an adjacent room, places it in a specially designed stand, and drains the cord blood in the same way. This approach is sometimes used when the delivery team prefers not to have extra steps happening during the third stage of labor.
Either way, the collected blood is weighed, sealed, documented, and shipped to the bank’s processing facility, where it’s tested, processed, and frozen in liquid nitrogen.
Delayed Cord Clamping and Collection
If you’ve discussed delayed cord clamping with your provider, you may wonder whether it’s compatible with cord blood banking. Delayed clamping, where the cord isn’t cut for at least 30 to 60 seconds or longer after birth, allows more blood to flow from the placenta to the baby. Research shows a three-minute delay can increase a newborn’s blood volume by about 30%. This is especially beneficial for preterm infants, and current guidelines from most obstetric organizations recommend at least a brief delay.
The catch is that the longer you wait, the less blood remains in the cord and placenta for collection. A significant delay can reduce the volume below the minimum threshold banks require for processing and storage. There’s no universally agreed-upon cutoff, but if delayed clamping is important to you, talk with both your provider and your chosen cord blood bank about what’s feasible. Some families find they can do a shorter delay (30 to 60 seconds) and still collect enough for banking, though the volume will be smaller than with immediate clamping.
How Long Cord Blood Lasts in Storage
Cord blood is stored in liquid nitrogen at roughly negative 196 degrees Celsius. At that temperature, biological activity essentially stops. The longest validated storage to date comes from the José Carreras Cord Blood Bank in Germany, where researchers confirmed that unprocessed cord blood units remain viable after 29 years of cryopreservation. Volume-reduced units (those processed to remove excess plasma or red blood cells) have been validated for 25 years with manual processing and 18 years with automated processing.
In practical terms, scientists believe cord blood stored properly in liquid nitrogen could last indefinitely, since the cells aren’t aging or deteriorating. The validated numbers simply reflect how long researchers have been testing stored samples, not a hard expiration date.
How to Choose a Bank
Whether you go public or private, look for accreditation from AABB (formerly the American Association of Blood Banks) or the Foundation for the Accreditation of Cellular Therapy (FACT). These organizations set the quality standards for how cord blood is collected, tested, processed, and stored. An accredited bank has been independently audited against those standards. In the U.S., cord blood banks that release units for transplant also need FDA approval.
For private banks specifically, compare the total cost over time (not just the initial fee), ask what processing method they use, and find out what happens to your sample if the company goes out of business. Some contracts include provisions for transferring samples to another facility; others don’t. Ask whether the bank has ever had samples used in actual transplants, how many units they store, and what their recovery rate is when thawing samples for use.
Steps to Save Cord Blood
- Weeks 28 to 34 of pregnancy: Decide between public donation and private banking. If donating, confirm your hospital participates. If going private, choose a bank, sign the contract, and request a collection kit.
- Before delivery day: Inform your OB or midwife that you plan to collect cord blood. Bring the collection kit to the hospital if you’re using a private bank.
- During delivery: Remind your delivery team. The collection happens after the cord is clamped and cut, requiring no extra effort from you.
- After collection: The sample is shipped to the bank, processed, tested for infectious diseases and cell count, and cryopreserved. You’ll typically receive confirmation that the sample met quality standards within a few weeks.
For private banking, you’ll also provide a maternal blood sample and a family medical history, since both are used in screening. Public banks require the same information as part of the donation eligibility process.