When you went to the clinic during your pregnancy, did you have a scan and the doctor said, "The baby looks a little big"? It's normal for any mother to feel a little scared when she hears that. What does it mean when she says "a big baby"? Is it dangerous? Does it affect the delivery? You probably have a lot of questions like these in your mind. Don't be afraid. Today we are talking about this. In medicine, this condition is called Fetal Macrosomia. We will talk about everything in a simple way that you can understand.
Simply put, what is Fetal Macrosomia?
Fetal Macrosomia is simply a condition where the baby weighs significantly more than normal at birth. However, there is no single definition among doctors of what constitutes a "big baby."
- Some doctors say that if a baby weighs 4 kilograms (8 pounds and 13 ounces) or more, it is called Fetal Macrosomia.
- Others say the weight should be 4.5 kilograms (9 pounds 14 ounces) or more.
However, more important than these statistics is what the doctor says about you and your baby's condition.
You may also hear the term "Large for Gestational Age" (LGA). This means that your baby is heavier than 9 out of 10 other babies of the same age at the week you deliver.
The important thing is that Fetal Macrosomia cannot always be predicted accurately in advance. Sometimes, even mothers with no risk factors can have large babies.
Why does a baby grow like this? What are the risk factors?
It's hard to pinpoint just one reason why a baby is overweight. There can be many factors that contribute to it. However, there are several risk factors that increase the likelihood of a baby being overweight.
The main and most important risk factor is diabetes in the mother during pregnancy. It can be gestational diabetes, which only occurs during pregnancy, or it can be pre-existing diabetes, such as Type 1 or Type 2.
Think of it this way. The baby gets its nutrition from the mother's blood through the placenta. So if the mother's blood sugar level is high, the baby also gets that high amount of sugar. In response, the baby's body produces more insulin and growth hormone. These hormones cause the baby to store more fat, and the baby's overall size increases. Large babies, especially those born to mothers with diabetes, may have larger shoulders. This can lead to complications during childbirth.
In addition to diabetes, there are several other risk factors for fetal macrosomia in the table below.
| Risk Factor | Simply explained |
|---|---|
| Obesity before pregnancy | If you are significantly overweight before you get pregnant, your chances of having a large baby can increase by 4 to 12 times. |
| Excessive weight gain during pregnancy | If you gain more weight than necessary during pregnancy, the baby may receive more nutrition and grow larger. |
| Having had large babies in previous deliveries | If you've had a big baby before, the chances of your next baby being big are 5 to 10 times higher. |
| Having given birth to many children | If you already have three or more children, the next ones are likely to be larger in size. |
| Being a big baby when you are born | If you weighed more than 8 pounds at birth, you are twice as likely to have a large baby. |
| Two weeks past the due date | If the pregnancy exceeds 42 weeks past the due date, the baby may gain weight as it continues to receive nourishment. |
What complications can arise when having a large baby?
Having a large baby can slightly increase the risk of complications for both mother and baby during delivery. However, it is important to remember that these do not happen to everyone. The medical team is always prepared for such an eventuality.
Possible effects on the mother
- Longer labor: The pushing phase, especially when the baby comes out, may take longer.
- Shoulder dystocia: This is the most common complication. This occurs when the baby's large shoulders get stuck between the mother's pelvic bones after the baby's head comes out. Although this is an emergency, doctors and nurses are trained to manage it.
- Vaginal tears: When a large baby comes out, there is a greater chance of damage to the vagina and surrounding tissues.
- Postpartum hemorrhage: Excessive bleeding after childbirth can occur because the uterus does not contract properly, causing more bleeding than normal.
- Uterine rupture: This is very rare, especially for mothers who have had a previous cesarean section (C-section).
Possible effects on the baby after birth
- Low blood sugar: Because the baby was used to producing more insulin in the womb, the baby's blood sugar levels may be low after birth.
- Breathing difficulties: Some babies may have breathing difficulties immediately after birth.
- Jaundice: Yellowing of the skin and eyes due to elevated bilirubin levels.
- Increased red blood cell count.
If any of these conditions arise, the medical team at the hospital's pediatric ward will provide the necessary treatment immediately. It may be necessary to keep the baby in the neonatal intensive care unit (NICU) for a few days.
How do you know exactly how big the baby is?
This is a very important question. The only way to confirm fetal macrosomia with 100% accuracy is to weigh the baby after birth.
During pregnancy, doctors only make guesses. They use several methods to do so.
1. Fundal Height Measurement: You may have seen the doctor at the clinic measuring your belly with a tape measure. This measures the height of the uterus and gives an idea of the baby's growth. If the uterus is larger than expected, it can be suspected that the baby is also large.
2. Ultrasound Scan: If you suspect that your baby is large, your doctor will refer you for a scan. The scan measures the size of the baby's head, abdomen, and leg bones, and uses that data to estimate the baby's weight.
But remember, a scan doesn't give you an accurate estimate of your baby's weight, it's just an estimate. This estimate can vary by about 10%. For example, if the scan shows your baby weighs 4kg, the actual weight could be between 3.6kg and 4.4kg.
Therefore, the doctor will discuss with you the best method for childbirth after considering the scan report and your other risk factors.
How to manage this condition and plan delivery?
If you suspect your baby is large, your doctor will talk to you about how to plan your delivery. There are two main options here.
- Vaginal Delivery: If the baby is not too large and there are no other complications, you can try to deliver the baby vaginally. However, the medical team is more concerned about risks like Shoulder Dystocia.
- Cesarean section (C-section): If your baby weighs more than 4.5 kilograms, or if you have diabetes, your doctor may recommend a planned cesarean section to reduce the risk of complications.
Some people think that it is better to deliver the baby early because the baby is getting bigger. However, medical research shows that delivering the baby before 39 weeks without any other medical reason does not reduce complications. Therefore, it is most important to follow your doctor's advice.
What can we do to prevent fetal macrosomia?
Because there are many factors that affect a baby's development, this condition cannot be prevented 100%. However, there are a few things you can do to reduce the risk.
- Attend regular prenatal clinics: Go to every clinic regularly. This will allow the doctor to monitor your health and the baby's development. Also, be sure to get a glucose tolerance test to check for gestational diabetes.
- Exercise during pregnancy: Talk to your doctor about what exercises are safe and appropriate for you, and then engage in them. Even something as simple as walking can be very beneficial.
- Managing Diabetes: If you have gestational diabetes, follow your doctor's and nutritionist's advice. If you have pre-existing diabetes, control your blood sugar levels as best you can.
- Weight Management: Try to maintain a healthy weight before you get pregnant. This can be achieved through a balanced diet and exercise. For some people who are severely obese, medical advice may also be required to consider options such as bariatric surgery.
Finally, don't panic when you find out your baby is big. It doesn't mean there will be a problem. The best thing you can do is manage your risk factors and follow your doctor's instructions carefully. Talk to your doctor about any questions or concerns you may have.
Take-Home Message
- Fetal macrosomia is a condition in which a baby weighs more than normal at birth. This is a condition that can often be managed successfully.
- The main risk factor for this is the mother having diabetes during pregnancy.
- Scans performed during pregnancy do not provide a 100% accurate estimate of the baby's weight, but only an estimate.
- The best thing you can do is to go to the clinic regularly, follow a healthy lifestyle, and control your weight and blood sugar levels.
- Talk openly with your doctor to make the best decision regarding your delivery. Share all your concerns and fears with them.
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