Tests in the First Trimester of Pregnancy

on Mar 08, 2013

by Dr. Prabha Sahgal, MD

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To know that your baby is healthy you should go through a few tests during your first trimester or early pregnancy. Numerous different tests are performed at this time.

Pregnancy brings joy that can’t be explained in words. Especially if it is your first time, you will feel immense happiness and delight. However, with that comes a little apprehension and tension. Pregnancy is huge and it brings numerous responsibilities. Your body undergoes a number of changes and you have to cope up with all of them. Besides that you should be careful about what you eat and what you avoid. You need to cope with the various problems that pregnancy brings such as morning sickness, fatigue, nausea, and pain in the abdomen. You should take good care of yourself to ensure that your baby is fine and is growing well inside you. Some of them are listed here. Claim Your 20 Free Pregnancy Tests – Click Here To know that your baby is healthy you should go through a few tests during your first trimester or early pregnancy. Numerous different tests are performed at this time.

Blood test

When you visit your doctor for the first time since conception, your doctor will go through your entire medical history and conduct a physical examination. He will draw your blood to perform these tests. Blood test includes complete blood count or CBC, which will show the number of red blood cells, white blood cells, and platelets present in your blood and whether the count is normal. This will reveal how healthy you are.

Rh test

Your Rh factor will also be tested because the Rh factor plays an important role in the welfare of the child. Rh is actually an antigen and it is present on the RBC or red blood cells of many people. If the antigen is present on your red blood cells, you are Rh Positive. If it is absent, you are Rh Negative. Performing this test is very important in order to save you and your baby from Rh incompatibility condition. This occurs when you are Rh negative and your baby is Rh positive. This could cause a serious problem in your next pregnancy.


An ultrasound is also a routine test and as the name suggests, sound waves are used in this test. As a result you will be able to see the baby’s picture in your uterus. Ultrasound is conducted in the first trimester in order to find out the age of the embryo, its size, and its position. If the doctor detects any problems, she might even go for a transvaginal ultrasound in order to get a clearer picture of the baby.

First trimester screen

This screen includes a series of ultrasound tests and blood tests to find out if there is any risk of chromosomal abnormalities in your baby. The results of this test are not definitive but it is the most accurate test that is available today. The test will show if there are any risks of chromosomal defects and will also determine other problems such as cardiac disorders, and so on.

Chorionic Villus sampling

The CVS is another test used to check if there are certain defects. Chorionic villus is actually a part of the placenta, which is attached to the uterine lining. This test is performed during the ninth week, the tenth week, or the eleventh week of pregnancy. This test is especially important for older women.

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Tests in the First Trimester of Pregnancy, 5.0 out of 5 based on 6 ratings

Dr. Prabha Sahgal MD, is board certified in obstetrics and gynecology and subspecialty board certified in reproductive endocrinology and infertility. Dr. Sahgal holds a B.S. degree from MIT in molecular biology and currently serves on the ConceiveEasy board of directors.

  • elysia

    I conceived 20 days ago and found out I am pregnant. In those 20 days I have consumed large ants of alcohol and RX drugs (ativan, norco, flexeril) how badly will this effect my growing baby and will I miscarry? I have stopped it all now that I know. But did I really mess things up?

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