For the nine months that your little one is swimming around inside of you, the umbilical cord is your baby’s lifeline, delivering a constant supply of nutrients and oxygen from your body. Towards the end of your pregnancy, the umbilical cord even delivers a broad supply of your protective antibodies, to shield your newborn from infection for the first three to four months of life. That’s one incredible cord!

What is delayed cord clamping?

Moments after the delivery, your doctor or midwife will clamp the umbilical cord. It is clamped in two places—one about two inches from the baby’s tummy and another closer to the placenta. Next, they will cut it or invite your partner to do it. (The cord is surprisingly strong and takes a pretty good clip to cut through it!)

The clamping ensures that the baby will not have any blood dripping out through the large umbilical blood vessels when the cord is cut. If you’re wincing in sympathy as you read this, don’t worry—the cord is kind of like your hair…it has no nerves and does not hurt the baby when cut!

It used to be common practice to clamp and then rush to cut the umbilical cord within 10 to 15 seconds after birth. But new research has shown that there are benefits to waiting. In recent years, we’ve discovered that it is actually better for babies if the doctor or midwife waits a bit before clamping the cord (30 seconds to a couple of minutes).

What’s the purpose of delayed cord clamping?

It turns out that the old saying about good things coming to those who wait…is true when it comes to cord clamping, too!

Waiting just a little bit before clamping the umbilical cord can provide your baby some amazing benefits. When we delay clamping, babies receive 2 to 3 ounces (60 to 90 milliliters) of extra blood. That boosts a baby’s oxygen, and each extra red blood cell is chock full of extra iron, which lowers the baby’s risk of anemia…and helps support brain development.

BTW, doctors used to suggest the baby be held lower than the mom’s uterus while waiting for the cord to be clamped, to allow gravity to assist in the blood flow into the baby. But a study of 391 babies showed that the baby gets just as much extra blood when placed immediately in the mom’s arms as they get when held down by the vagina.

Delayed cord clamping benefits both full-term babies and preemies. And there is growing evidence that these benefits may even improve fine motor ability and social skills many years after birth!

What happens if the umbilical cord is not clamped?

Cutting the cord without clamping would put the baby in danger of bleeding out—that is why the cord is always clamped before cutting. However, one very uncommon situation where the cord is not and the parents allow the cord to stay attached to the placenta—after it has been delivered, the so-called “after birth”—and the cord naturally breaks off in five to 10 days. This is called a Lotus birth. Lotus births have not been thoroughly studied and there is a serious concern of infection as the decomposing placenta stays attached to the baby’s very vulnerable body during that first week. And besides, all the necessary blood travels from placenta to baby within the first few minutes after birth, so keeping attached longer is not likely to give babies an extra edge…and makes it much trickier to rock and cuddle your baby.

When is delayed cord clamping unsafe?

There are a few unusual situations in which delayed cord clamping may not be safe and immediate cord clamping should proceed. These instances include maternal hemorrhaging, problems with the placenta, or a baby not breathing that needs to be resuscitated. In these cases, it may be possible to quickly “strip” or “milk” the umbilical cord, squeezing extra blood into the baby rapidly so that the baby still benefits.

How long should you wait to clamp the cord?

The American College of Obstetricians and Gynecologists (ACOG) recommends delaying cord clamping until at least 30 to 60 seconds after birth. The World Health Organization (WHO) issued guidelines stating that “Delayed umbilical cord clamping (not earlier than a minute after birth) is recommended for improved maternal and infant health and nutrition outcomes.”

How long to wait may depend on other factors, such as whether you are interested in cord blood banking. Since delaying umbilical cord clamping will reduce the supply of blood available for cord blood banking, you should talk to your provider about the best way to do both.

The good news is, doctors know how to multitask so that early newborn care (such as drying the baby and keeping them warm through skin-to-skin contact on Mom’s body) can proceed even while the baby is still attached. So, even if you delay cord clamping, you don’t have to wait for those first precious newborn snuggles!

About Dr. Harvey Karp

Dr. Harvey Karp, one of America’s most trusted pediatricians, is the founder of Happiest Baby and the inventor of the groundbreaking SNOO Smart Sleeper. After years of treating patients in Los Angeles, Dr. Karp vaulted to global prominence with the release of the bestselling Happiest Baby on the Block and Happiest Toddler on the Block. His celebrated books and videos have since become standard pediatric practice, translated into more than 20 languages and have helped millions of parents. Dr. Karp’s landmark methods, including the 5 S’s for soothing babies, guide parents to understand and nurture their children and relieve stressful issues, like new-parent exhaustion, infant crying, and toddler tantrums.

Have questions about a Happiest Baby product? Our consultants would be happy to help! Submit your questions here.

Disclaimer: The information on our site is NOT medical advice for any specific person or condition. It is only meant as general information. If you have any medical questions and concerns about your child or yourself, please contact your health provider.