• WHAT'S YOUR REACTION?

     

    0

     

    0

     

    0

     

    0

Can Blood Tests for Pregnancy be Wrong?

on Jan 05, 2013

by Maureen Stephens, BS, RN

  • Rate this Article:
    VN:F [1.9.20_1166]
    Rating: 3.0/5 (2 votes cast)
Can Blood Tests for Pregnancy Be Wrong?

Sometimes things do happen that cause a blood test to give inaccurate results. It is rare, but it does happen. Find out how.

Most people think that blood pregnancy tests are 100% accurate, all the time. While we know that blood pregnancy tests done at a doctor’s office are much more accurate and reliable than home pregnancy tests, can they ever be wrong? Experts say that blood pregnancy tests are as much as 99% accurate. Of course, that leaves room for a tiny bit of error. So, what can happen to make blood pregnancy tests turn out wrong? Read on to find out. Claim Your 20 Free Pregnancy Tests – Click Here

The test is performed too early

A blood pregnancy test can only detect hCG in the blood at around seven days post-conception. If a pregnancy test is done before that seven days is up, the test might not be able to detect the hCG yet. This can cause a negative result when a woman is really pregnant.

Too high hCG levels

Sometimes, a woman will have extremely high levels of hCG in her blood when she is not actually pregnant. This can lead to a false positive pregnancy test. Some of the reasons for high hCG levels can be a tumor, ovarian cancer, a multiple pregnancy, blood or protein in the urine, or certain medications.

Too low hCG levels

Sometimes a woman will have low or even negative hCG levels. There can be a few reasons for this. Some reasons for a low or negative hCG level can be an ectopic pregnancy, or even a miscarriage. Your doctor can help you determine the reason for low hCG levels.

Chemical pregnancy

Sometimes a woman can get a positive blood pregnancy test when she is not actually pregnant. This can sometimes be called a “chemical pregnancy“. A chemical pregnancy is basically a very early miscarriage. Most women do not even know they were pregnant when they have a chemical pregnancy. However, if a woman has a blood test done very near the time that she miscarried, she might have a positive test result when she is not really pregnant.

The bottom line

As you can see, sometimes things do happen that cause a blood test to give inaccurate results. It is rare, but it does happen. If you have a blood test and you are concerned about the accuracy of that test, just ask your doctor to perform another one to make sure.

ConceiveEasy TTC Kit + 20 FREE Pregnancy Tests

ConceiveEasy® TTC Kit™ is the most complete fertility system available over the counter. Clinically proven to dramatically increase your chances of conception and help you get pregnant fast from the very first use. And now for a limited time, Try a FREE starter pack today & receive 20 FREE pregnancy tests and a FREE Digital BBT Thermometer!

Can Blood Tests for Pregnancy be Wrong? , 3.0 out of 5 based on 2 ratings

Ms. Stephens has spent over twenty years in the healthcare world, specializing in obstretical and medical/surgical nursing. She joined ConceiveEasy as she has a strong interest in educating and empowering women and promoting fertility awareness.

Related posts:

  1. False Negative Pregnancy Tests
  2. Types of Pregnancy Tests
  3. Are Home Pregnancy Tests Accurate?
  4. Medications That Cause False Positive Pregnancy Tests
  5. Blood Tests for Infertility
ask
  • Danyell84

    Wow, I always thought blood tests were very accurate always. Thanks for the info. I think I will stick with using my free Conceive Easy tests 2 weeks from a missed period.

    VA:F [1.9.20_1166]
    Rating: 2.0/5 (1 vote cast)
  • Zumba

    I had a blood pregnancy test and it came back negative but I have just been soo sick cant eat , cramps bloating , nausa and that metalic taste in my mouth I don’t know what to do ?

    VA:F [1.9.20_1166]
    Rating: 0.0/5 (0 votes cast)
  • Amy

    I’m so fustrated I have my period but they are very very barely there compare to my normal periods.I’ve had a 35 pound weight gain I am exhausted I am exhausted all the time I have pressure on my bladder I’ve had hair loss I am nauseous and my belly has gotten very extended and breasts are tender.I have had blood test be negativ.e. Please help me

    VA:F [1.9.20_1166]
    Rating: 0.0/5 (0 votes cast)
  • Brenda

    I am really confused.i had unprotected sex on August 24 i took the emergency pill almost 2 days after but before the 72 hour period! My last period was around aug 16 or 17th..but i have always had irregular menstruation so its impossible at this point to know whether its late or not..on friday september 13 i took 3 urine test all came out positive i went to the doctor yesterday got a blood preg test also positive…i an really confused could it be wrong did i take too early ??? Help please!

    VA:F [1.9.20_1166]
    Rating: 0.0/5 (0 votes cast)
  • Susie Hughes

    I have mirena iud in place. Have had no period now for over 6 weeks. Feeling very pregnant….. All symptoms! Have had blood test…. As I fear ectopic pregnancy…… Came back negative………then why do I feel so pregnant?

    VA:F [1.9.20_1166]
    Rating: 0.0/5 (0 votes cast)
  • Raquel Gutierrez

    i already had my son, but to find out about my pregnancy i went’nd got a blood test, my son was born a month early, premature, and a monrh earlier feom the due date i was told he would be born, but i just had to assure myself, can blood pregnancy test actually be inaccurate is that even possible?? ive always had irregular periods, but durimg the date they told me i was pregnant i had gotten my period, my pregnancy date was 7/7/12, expected due date 4/14/13.i got my periods in those months, june, july, n august, i never got my period in september though, so did they get it wrong im so confused!!!

    VA:F [1.9.20_1166]
    Rating: 0.0/5 (0 votes cast)
  • crystal brandon

    E I have a copper iud for 2yrs now since nov. 2013 i have been experiening pregnacy syptoms like i did with my last child. I have a bloated pregnacy belly again as if i were after i had completely lost it after i had give birth to my last child.i am constantly feeling baby like movements in my belly and also see my belly move. I seen obgyn and pregnacy test for both blood and urin has been negative. Also medical doctors do not detect me having a gi problem. I do not have gas and all else with me is well. So i really would like to know could be the problem especially with the moving inside of my belly its so uncomfortable and i am tired of testing. Would really like some help

    VA:F [1.9.20_1166]
    Rating: 0.0/5 (0 votes cast)
  • carol

    I had a baby 2 months ago n I haven’t got my period yet n I been having sex with protection I took 5 pregnancy test at home alredy n I’m not pregnant I also went with my gyn doctor n they took me another urine test n is negative n I never breastfeed my baby the only thing the doctor say is that I have very low iron and too much stress with 5 kidz that could be the reasons why I don’t get my period yet” n my question is do you recommend me too take a blood pregnancy test better ??

    VA:F [1.9.20_1166]
    Rating: 0.0/5 (0 votes cast)
  • Agador1114

    Another reason why ALL pregnancy tests can be wrong is if the women is experiencing a “Cryptic Pregnancy”. During a Cryptic Pregnancy the woman is in fact pregnant, but ALL of her tests, urine and blood are negative. I am currently 38 weeks pregnant and I have yet to have a positive urine OR blood test. I have created a Facebook page for women who are going through this. It is called “Cryptic Pregnancy Support Group”.

    VA:F [1.9.20_1166]
    Rating: 0.0/5 (0 votes cast)
  • Suzanne

    BLOOD PREGNANCY TESTS CAN BE WRONG!!! This is what is known as a “Cryptic Pregnancy”. Women who experience this NEVER get a positive test. I have created a support group for this on Facebook called “Cryptic Pregnancy Support Group”.

    VA:F [1.9.20_1166]
    Rating: 0.0/5 (0 votes cast)
  • winter_rogue

    I have done 5 home pregnancy tests done all positive , but my ultrasound they cant find a baby.. does it mean I am not pregnant?

    VA:F [1.9.20_1166]
    Rating: 0.0/5 (0 votes cast)
  • summer

    i missed my period last june, my last period was may 21-25. i toiok urine pregnancy test but the results are all negative. i tried blood test and its still negative. until now july 4 i doesnt have a period. do you think its still possible that i am pregnant?

    VA:F [1.9.20_1166]
    Rating: 0.0/5 (0 votes cast)
meet the Experts
Cart preview 1 Out of 1 items

Quantity(1)

$

$

Your Exclusive Free Bonus Gift:

20 FREE Pregnancy Tests
20 FREE Ovulation Tests
10 Pregnancy/10 Ovulation Tests