Umbilical Cord: Its Role During Pregnancy

During pregnancy, your baby relies on a remarkable structure called the umbilical cord for nourishment, oxygen, and healthy development. Often known as the baby's lifeline, the umbilical cord connects the growing fetus to the placenta, creating a vital pathway for the exchange of nutrients, oxygen, and waste products. Although it develops early in pregnancy and functions behind the scenes, its role is essential for supporting your baby's growth inside the womb. In this blog, we'll explore what the umbilical cord is, when it forms, how it works, its key functions, and why it plays such an important role throughout pregnancy. 

What Is the Umbilical Cord?

The umbilical cord is a flexible and cord-like structure that links the developing fetus to the placenta in the womb. It is often described as the lifeline of the child because it helps transfer oxygen and necessary nutrients into the body, and removes carbon dioxide and metabolic wastes from the body.

When you give birth to your baby, the umbilical cord will no longer serve any function, so it will be removed through the process of clamping and cutting. It will leave behind a stump that eventually withers off after a period of one to three weeks, leaving behind the baby’s navel.

When Does the Umbilical Cord Form?

The formation of the umbilical cord starts during the first trimester and acts as the major connecting structure between the baby developing in the womb and the placenta. It is the temporary structure formed in the womb, which plays a critical function in the development of the fetus in the mother's body.

It usually attaches to one side of the placenta and the other end of the umbilical cord attaches to the stomach region of the baby-to-be born. The main purpose of the umbilical cord is the transportation of oxygen and nutrients from the mother to the baby as well as transporting metabolic waste products from the baby to the placenta.

What Is the Function of the Umbilical Cord? 

The placenta and umbilical cord form a vital support system that helps your baby grow and develop throughout pregnancy.

Key Functions

• Provides Oxygen: Oxygen from the mother's bloodstream passes through the placenta and reaches the baby via the umbilical cord.
• Delivers Essential Nutrients: Nutrients such as glucose, proteins, fats, vitamins, and minerals are transported to the baby to support growth and development.
• Removes Waste Products: Carbon dioxide and other waste products produced by the baby are carried back through the umbilical cord to the placenta, where they are transferred to the mother's bloodstream for removal.
• Maintains Continuous Blood Flow: The umbilical cord acts as a two-way pathway, ensuring a constant exchange of oxygen, nutrients, and waste products between the mother and baby.

What Happens to the Umbilical Cord After Birth? 

Since the birth of your baby, he/she will no longer require the umbilical cord because she/he will be able to breath, eat, and operate on his/her own. The healthcare professional will clamp and cut the cord soon after your baby's delivery so that the baby no longer relies on the placenta.

This leaves a section of the umbilical cord called the umbilical stump attached to your baby's body until about one to three weeks later, when it becomes dry, shriveled, and eventually falls off, leaving your baby with her navel.

This process of clamping and cutting of the umbilical cord is painless for the baby since the umbilical cord contains no nerves for transmitting pain sensation.

Common Umbilical Cord Problems During Pregnancy

Most umbilical cord complications are uncommon, but they can affect the baby's supply of oxygen and nutrients during pregnancy. Early diagnosis through routine prenatal check-ups and ultrasound scans can help doctors monitor these conditions and plan the safest care for both mother and baby.

Single Umbilical Artery

A normal umbilical cord contains one vein and two arteries. In some pregnancies, only one artery develops, a condition known as a single umbilical artery. While many babies are born healthy, this condition may sometimes be associated with growth problems or birth defects, which is why additional monitoring may be recommended.

Umbilical Cord Prolapse

Umbilical cord prolapse occurs when the umbilical cord slips through the cervix before the baby during labour. This can compress the cord and reduce the baby's oxygen supply, making it a medical emergency that requires immediate treatment..

Vasa Previa

Vasa previa is a rare but serious pregnancy complication where fetal blood vessels run across or near the cervix. If these vessels tear when the water breaks or during labour, the baby can lose a significant amount of blood. Early detection is critical for a safe delivery.

Umbilical Cord Knot

An umbilical cord knot, also called a true knot, can form when the baby moves through a loop of the cord. Most knots remain loose and do not cause problems, but a tight knot may restrict blood flow and oxygen delivery to the baby.

Nuchal Cord (Cord Around the Baby's Neck)

A nuchal cord occurs when the umbilical cord wraps around the baby's neck. This is a common condition and is usually harmless. However, if the cord becomes tightly wrapped, doctors may monitor the baby more closely during labour..2

Medical Applications of Umbilical Cord Tissue

Research has shown that umbilical cord tissue contains stem cells, growth factors, and bioactive molecules that can support healing and tissue repair. Some of its key medical applications include:

• Helps heal chronic wounds, burns, and diabetic ulcers.
• Supports the repair of damaged skin and other tissues.
• Promotes the growth of new cells needed for healing.
• May help improve tissue repair and regeneration after injury.
• Provides a natural framework that supports the growth of new tissues.
• Contains stem cells that are being researched for treating inflammatory and degenerative diseases.
• May have future applications in nerve repair and heart tissue regeneration.
• Continues to be explored for use in regenerative medicine and advanced cell therapies

What Is Umbilical Cord Blood Banking?

Umbilical cord blood banking is the process of collecting and storing the blood that remains in the umbilical cord and placenta after a baby is born. This blood is rich in hematopoietic stem cells, which can develop into different types of blood and immune cells and are used in the treatment of various diseases.

Benefits of Umbilical Cord Blood Banking 

• These stem cells are already used to treat many blood-related diseases and disorders.
• Cord blood can be used as an alternative to bone marrow in stem cell transplants.
• Finding a matching cord blood unit is often easier than finding a matching bone marrow donor.
• The collection process is safe, painless, and takes place after the baby is born.
• Collecting cord blood does not interfere with labour, delivery, or the baby's care.
• Stored cord blood may be useful for the child or a compatible sibling in the future.
• Public cord blood donation can help save the lives of patients who need stem cell transplants.
• Banking cord blood preserves a valuable biological resource that may support future medical advances and regenerative therapies.

Final thoughts

The umbilical cord is not just an immediate connective structure between the mother and the baby, but serves an important purpose in the process of development, providing oxygen and nutrients and disposing of waste throughout the duration of the pregnancy. While there may be complications that arise with the umbilical cord, regular pregnancy monitoring helps detect such problems early on and take appropriate action. In addition to serving its purpose in pregnancy, umbilical cords still have great potential in medicine through the use of cord blood and cord tissue, both of which contain valuable stem cells.

Frequently Asked Questions (FAQs)

1. What is the main function of the umbilical cord during pregnancy?

The umbilical cord acts as a lifeline between the baby and the placenta. Its primary function is to deliver oxygen and essential nutrients to the developing baby while carrying carbon dioxide and waste products back to the placenta for removal.

2. When does the umbilical cord form during pregnancy?

The umbilical cord begins to develop during the first trimester of pregnancy. As the baby grows, it becomes the vital connection that supports fetal development by facilitating the exchange of oxygen, nutrients, and waste products.

3. What happens to the umbilical cord after birth?

After delivery, the umbilical cord is clamped and cut because the baby can breathe and feed independently. A small stump remains attached to the baby's abdomen and typically falls off naturally within one to three weeks, leaving behind the belly button.

4. Why is the umbilical cord important for fetal development?

The umbilical cord is essential for healthy fetal growth because it continuously supplies oxygen, nutrients, and blood flow needed for organ development. Without a properly functioning umbilical cord, the baby would not receive the support required to grow and thrive in the womb.