When you are expecting to become a mother, you will have to undergo a lot of different medical tests, right? Scans, blood tests... Among these, you may have heard of the 'AFP test'. It is normal to feel a little scared and curious when you hear this. Many mothers get nervous when they hear the name of this test. So, that is why today we will talk about this blood test called Alpha-fetoprotein (Alpha-fetoprotein - AFP) in a simple language that you can understand.
Simply put, what is AFP?
It's actually quite simple. Alpha-fetoprotein (AFP) is a protein that is naturally produced by the liver of your developing baby. This protein also passes into your blood from your baby. So, what doctors do is take a sample of your blood and measure the amount of AFP in it.
The important thing is that this is not a diagnostic test . It is called a screening test . That is, it only gives an indication of whether the baby is at risk of having a birth defect, especially a neural tube defect. The neural tube is the part of the baby's body that will become the brain and spinal cord in the future.
This means that this test does not 100% guarantee that you have a disease. It only gives an indication of the possibility. This may be part of a "Quad Screen" test package that your doctor may recommend.
How and when is this test done?
This is a very simple, routine blood test. There is no reason for you to be afraid.
- When: This test is usually done between 15 and 20 weeks of your pregnancy . That means you're about 4 months along.
- How it's done: Just like you would normally give blood for any other disease. A technician will use a small needle to draw a small amount of blood from a vein in your arm. You'll feel a slight tingling sensation, and you may feel a little bruising where the needle was inserted. That's it. Your blood sample will then be sent to a lab for testing.
What do the results say?
This is the part that scares a lot of people. But let's see what it actually says. Don't worry, okay?
Generally, there are three types of results that can be obtained. Let's understand it in a table like this.
| Result | What it could mean (Possible Indication) |
|---|---|
| Normal or Negative Result | This is the good news. This means that your baby has a very low risk of having a neural tube defect or certain other chromosomal abnormalities. |
| Higher than expected AFP level | This may indicate a small chance that the baby has a neural tube defect (e.g. spina bifida). However, there are many other factors that can affect this. |
| Low AFP level than expected | This may indicate a small chance of a chromosomal abnormality such as Down syndrome or Edwards syndrome. |
Should I be worried if the result is normal?
Don't be afraid! Again, this is just a risk. Just because the result is abnormal doesn't mean there is a problem with the baby. Often these can be " false positives." That is, the test may indicate that the baby has a problem, even though there is no problem.
There are many other reasons why AFP levels may be high or low.
- Miscalculation of gestational age: Your gestational age may be a week or two off from what you think. This can greatly affect the result, as AFP levels vary from week to week.
- Twins : If you are having twins, the AFP level in the mother's blood will naturally increase because both babies are producing AFP. You may not even know you are having twins!
- Your health conditions: Things like your body weight and whether you have diabetes mellitus can also affect this result.
Okay, so what happens next?
If your AFP result is not normal, your doctor will take the next steps gradually, without panicking.
1. Rechecking the result: Sometimes the doctor will ask you to do another blood test to confirm the result. Most of the time, the result comes back normal the second time.
2. Detailed Ultrasound Scan: This is the most important next step. The doctor will ask you to have a good Ultrasound scan. From this,
- You can confirm your exact pregnancy date.
- You can see exactly if they are twins.
- The baby's body organs, especially the brain, spine, and heart, can be carefully examined to see if there are any birth defects.
3. Other specialized tests: If there is still some doubt after the ultrasound scan, the doctor may recommend another test. That is a test called amniocentesis . Here, a very small amount of the water (amniotic fluid) surrounding the baby is taken and tested. This can provide more specific, confirmatory information.
4. Medical consultation: At each step, your doctor will explain everything to you. Talk to him about any questions or concerns you may have. If necessary, he can refer you to a specialist.
Making decisions at a time like this can be difficult. But remember, you are not alone. Your doctor and your medical team are there to help you and give you all the information you need. You can talk to them and make the best decision for you and your family.
Take-Home Message
- AFP is a test that gives an indication of the baby's health, but it does not 100% confirm the presence of a disease.
- Don't panic if the test result is not normal. It could be due to other reasons, such as having twins or miscalculating the gestational age.
- Don't jump to conclusions based on the AFP result alone. The next ultrasound scan and other tests will give a clearer picture.
- It's your right to talk openly with your doctor about any concerns or fears you may have. It's also the best way to ease your fears.
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