Book an Appointment
+91-7899912611
pregnancy

Blood Tests to confirm Pregnancy: When, How and Accuracy

  • 4.8 (6 Votes)
  • 36387 views

Pregnancy blood test measures hCG hormone in the blood to confirm pregnancy. It can be taken 7-12 after ovulation. hCG levels lesser than 5 mIU/ml signifies negative test while greater than 25 mIU/ml indicates a positive pregnancy test. It is highly reliable and accurate as compared to home pregnancy tests/ urine tests.

Pregnancy tests could be either a urine pregnancy test or blood test. A blood test is a reliable way to determine or confirm a pregnancy. It is performed by the doctors in a hospital, a health clinic or a laboratory. It measures the value of the hormone called Human Chorionic Gonadotropin (hCG) that is secreted by placenta cells in the beginning of pregnancy. The detection of the hormone in the blood is an indicator that a woman is pregnant. If a woman is pregnant then her hCG level starts to increase sharply almost doubling in a gap of 2 to 3 days which is picked up in a test result. The level of hCG hormone reaches its peak during 8-11 weeks and thereafter it starts to level off. A doctor may ask you to get an hCG test done as early as a week after a period is missed to detect the possible pregnancy.

What is Blood Test in Pregnancy?

This is a simple blood test to check the levels of Hormone HCG in the blood of a pregnant lady. HCG (Human Chronic Gonadotropin) hormone is produced by placenta during pregnancy. HCG levels in pregnant women are much more in comparison to non-pregnant women. HCG hormone can only be detected after a week of conception. Results of your tests, whether urine or blood test, are based on the measurements of HCG hormone. Usually, the doctors call the patient to tell them about pregnancy just after seeing the increased levels of HCG hormone in the body of women.

How Does Blood Test During Pregnancy Works

As we have discussed above, this is a simple blood test. Some blood is taken out of your veins with a syringe. This process of taking blood out is called as Venipuncture. This test is more informative in comparison to a urine test. Doctors take blood sample during pregnancy, to check the levels of HCG hormone in the blood.

blood test during pregnancy

The results, which doctors get after taking blood samples, are a way to measurement and comparison of the levels of HCG hormone as it gets doubled every two days in early pregnancy days. This comparison of levels helps the doctor to keep a check on the health of the baby. These tests can help the patient avoid miscarriage, which is a big issue in pregnancy. The chances of having multiple babies are also identified by these levels of hormones. Try to take the blood test during pregnancy every two weeks, to keep a check on your pregnancy health.

Types of Blood Tests for Pregnancy Detection

Pregnancy detection blood tests come in two types:

  • Quantitative blood test: Is used to measure the accurate amount of hCG in the blood. A quantitative beta hCG test is capable of detecting even very small amount of hCG in blood. Due to the fact that this test can pick the concentration of the hormone in the blood, it is quite useful in finding out about various other problems that can occur during a pregnancy. Along with some other tests, beta hCG blood test is used to find out an ectopic pregnancy. It is also helpful to observe a woman’s condition past a miscarriage.
  • Qualitative Blood test: It lets you know whether you are pregnant or not through a mere yes or no. This test just checks the presence of hCG hormone in the blood and is not capable of measuring its quantity.

Interpretation of the Results

The doctor interprets the results of the blood test in pregnancy by checking the levels of Human Chorionic Gonadotropin hormone in the body of pregnant women.

  • If the hCG levels are below 5 mIU/ml then the test is considered negative and the woman who had given the blood sample is not pregnant.
  • If the hCG levels are above 25 mIU/ml then the woman is considered to be pregnant.
  • If hCG levels are between 6 to 24 mIU/ml then no interpretation can be made.

If someone is having higher hCG levels in the absence of pregnancy then the following can be the possible reasons of raised levels:

  • Presence of interfering antibodies
  • It can be the indication of infection in uterus
  • Can be the symptoms of ovarian cancer
  • Pituitary hCG

If hormone levels are less in amount than the normal levels during pregnancy, then there are chances that this may be the case of:

  • Death of the fetus
  • A complete miscarriage
  • An abnormal pregnancy
  • Ectopic pregnancy

Risks With Blood Test in Pregnancy

There are some risks that can come along with the blood test during pregnancy. The most common risk associated from the blood test is swelling on the target area.

risks with blood test in pregnancy

Some other risks are:

  • Abnormal amount of bleeding
  • Losing consciousness for a short time
  • Infections can be caused to the skin

Note: If you have ever faced the above-mentioned issues relating to the blood drawn, then do consult your doctor as soon as possible.

Accuracy of Pregnancy blood test

A qualitative hCG blood test is an effective way to test pregnancy and is perfectly accurate in measuring hCG in blood. Therefore, the test results are completely reliable. Moreover, this blood test also aids the doctors in finding about the progress of the pregnancy.

accuracy of pregnancy blood test

How soon can I take blood test?

After you have conceived, the levels of hCG in the bloodstream increase that is picked up by the pregnancy blood test. Being highly sensitive as compared to urine tests, blood test is able to detect a pregnancy as early as six to eight days after ovulation.

Advantages of blood pregnancy test

Following are certain advantages of blood test for which you may want to prefer it once a pregnancy is expected.

  • It can detect a pregnancy faster than a urine test, which could mean that it can pick up accurate result right after 7 or 12 days of conception.
  • A blood test is useful in measuring the amount of hCG in the blood which can further help the doctor in managing the pregnancy by tracking problems in it.

Disadvantages of blood test

Just as advantages, there are some drawbacks associated with pregnancy blood test, which you may have to take into consideration before going for it.

  • Blood test is an expensive option because of the cost of the laboratory and doctor’s fees involved in it. When compared to urine test that can be easily obtained and used at home a blood test demands both money and time.
  • You will have to wait longer to get a result
  • Done only within a lab

Is test result affected with drugs, medication, or alcohol?

Mostly, alcohol drugs or medicines don’t affect a pregnancy blood test result. It only aims at determining the hCG level in the blood. But there are chances that the amount of hCG hormone present in fertility medicine may impact the result sometimes turning it into a false positive.

Be it a urine test or blood test, pregnancy tests are usually accurate. A blood test is more reliable as compared to a urine test due to the detailed procedure and involvement of a doctor. So it is up to you to pick the one that suits you the best.

If you are on fertility treatments, getting a false positive can be disturbing. Always follow the guidelines of taking a pregnancy test if you are on fertility drugs. To know more about the pregnancy test after fertility treatment, call at +917899912611.

Dr. Kavita Jaggi Agrawal

About The Author

Infertility Specialist, Obstetrician Dr. Kavita Jaggi Agrawal
Agra

Dr. Kavita Jaggi Agrawal is an obstetrician, gynecologist and infertility specialist who is providing her valuable expertise in the field of gynecology and infertility issues. She ensures that the patients receive the required fertility treatments well on time. Dr. Kavita specializes in the treatments like High Risk Pregnancy Care, In Vitro Fertilization (IVF) and Reproductive Medicine. Currently, she is practicing at Amit Jaggi Memorial Hospital, Vibhav Nagar, Agra.

SOURCES AND REFERENCES:

  1. When to take pregnancy test? pregnancy test, Elawoman - 2018
  2. What is absolute eosinophil count (aec) blood test? blood test, Elawoman - 2018
  3. Role of hcg injections in fertility treatments Human Chorionic Gonadotropin, Elawoman - 2018
  4. 10 simple pregnancy tips to help you have a normal delivery pregnant lady, Elawoman - 2017
  5. Causes of false negative pregnancy test HCG hormone, Elawoman - 2018
  6. What are the functions of uterus? uterus, Elawoman - 2017
  7. 10 best ways to get pregnant faster pregnancy faster, Elawoman - 2017
  8. What are the causes of false positive pregnancy test? false positive, Elawoman - 2018
  9. Can infertility drugs cause premature menopause fertility drugs, Elawoman - 2017
  10. Preparing for your first fertility clinic visit fertility treatment, Elawoman - 2017

6 Comments

user_img

Jagjeet Kumar

A blood test is an accurate way to confirm pregnancy but we cannot do it on our own that's heartbreaking.

Oct. 11, 2018, 2:13 p.m. 5.0

user_img

Khushboo Prasad

Every time I have a blood test, the injected area gets swelled up. Is it normal?

Sept. 20, 2018, 7:57 p.m. 4.5

user_img

Jessica

I never knew that increase or decrease in HCG hormones can even affect the child during pregnancy. Thanks for the knowledge!

Sept. 13, 2018, 12:03 a.m. 5.0

user_img

Mitika Rama

Is there any chance if your blood test goes negative but you are pregnant in real? Is there any chance of failing a blood test to evaluate pregnancy?

Sept. 12, 2018, 1:46 p.m. 4.5

user_img

Nityanand Kumar

Home pregnancy kit is for self-assurance but you can only be 100% sure after having the blood test. I strongly believe this too.

Aug. 27, 2018, 4:37 p.m. 5.0

user_img

Sourish Raghunathan

Aug. 25, 2018, 3:45 p.m. 4.5

View all comments

Leave a Comment

Rating

Disclaimer

The information displayed on this webpage covers general information on several medical conditions, fertility treatments, IVF ICSI, surrogacy procedure, home remedies, and their respective treatments. The exclusive purpose of the displayed information is for the sake of general understanding and it has been collected from open sources which heavily rely on research and laboratory tests. However, the information shared here should not be considered as a medical advice or an alternative to consultation with a registered medical practitioner or licensed healthcare professional.

It is not advised to self-diagnose or treat any medical condition or disease following the information given in this article. We insist you to consult a registered practitioner and never try to replace their advice or discontinue treatment in between by relying solely on the information obtained. External links to different websites as well as videos given on the website serve the purpose of sharing knowledge only. Ela being an Independent Medical Information platform is neither responsible nor guarantees the authenticity, reliability, and accuracy of these videos and websites in any way. We do not intend the information displayed here to be used for a medical emergency, if you seek medical attention for yourself (or any other person with whom you want to share the information with), we advise you to directly get in touch with the hospital or the doctor.

Related Article view all

Pregnancy
How to Improve Food Digestion During Pregnancy
Dr. Pushpa Kaul
Dr. Pushpa Kaul 4.5 (1 Votes)

How to Improve Food Digestion During Pregnancy

During pregnancy, a woman goes through hormonal changes. Some of these changes can cause adverse effects on your digestive system. Know the factors that can help you improve your digestive system. Some of these factors include staying hydrated, eating fibre rich foods, exercising, quitting drinking and smoking.

Read More

Pregnancy
Importance of Postnatal Care for Mother and Newborn
Dr. Aanchal Agarwal
Dr. Aanchal Agarwal 4.8 (6 Votes)

Importance of Postnatal Care for Mother and Newborn

Post Natal Period is the time after the baby is born and this is the time when maximum care is required by both the baby as well as the mother. You should be aware of various aspects of this phase like doctor visits, health check-ups, breast-feeding, self-care etc. Postnatal care helps the woman in regaining her strength and health.

Read More

Pregnancy
7 Post Pregnancy Exercises to Lose Extra Fats
Dr. Chitwan Dubey
Dr. Chitwan Dubey 4.7 (6 Votes)

7 Post Pregnancy Exercises to Lose Extra Fats

Maintaining an exercise routine after you have given birth would not only get you back in shape but it also makes it easy for you to steer clear of postpartum depression. You can start with exercises such as Running or Walking, Deep Breathing with Crunches, Forearm Plank, Walking Leap, Pushups, Wide Lifts and Floor Bridge to shed extra weight around your belly, thighs, butts and other body parts.

Read More

More From Author

Planning Baby
How Often Should You Have Sex When Trying To Conceive

How Often Should You Have Sex When Trying To Conceive

Wondering how to get pregnant fast. Deliberating whether frequent s...

Read More

Planning Baby
Must know risk factors of Pregnancy after 30

Must know risk factors of Pregnancy after 30

How to become pregnant after your 30. Keep track of ovulation days ...

Read More

Planning Baby
Faint lines on Pregnancy Test

Faint lines on Pregnancy Test

Getting pregnant is on your mind, you have used the ovulation perio...

Read More

Trending Articles

surrogacy
surrogacy

5 Best Surrogacy Doctors in India

Find the list of best surrogacy doctors in India who offers the best treatment with the highest success rate. The list has been categorized on the basis of doctors fame, experience, reviews, ratings, and cost. Dr. Mohit Saraogi from Saraogi Hospitals and IRIS IVF Centre and Dr. Kaberi Banerjee from Advanced Fertility Centre top the list of the best surrogacy doctors in India.

Read More 4.5 (1 Votes)

IVF
ivf

Best IVF Doctors in India with Highest Success Rates

Find here the list of best IVF doctors in India on the basis of Ratings, Success Rate, Services offered, IVF cost packages and available Facilities. Dr. Nisha Bhatnagar, Dr. Kaberi Banerjee and Dr. Anjali A Deval top the list of such IVF doctors in India due to their unique pricing system, popularity and high success rate.

Read More 4.7 (3 Votes)

surrogacy
surrogacy

Top Surrogacy Centres in India with Highest Success Rates

In this article we bring you the best Surrogacy Centers and clinics in India with Review Ratings, Cost Estimates, and Surrogacy Success Rate to help you make the best choice. Aveya IVF and Surrogacy Centre and Advanced Fertility and Surrogacy Centre tops the list of such surrogacy centres in India due to their low treatment costs, popularity and high success rates.

Read More 4.8 (2 Votes)