Ectopic Pregnancy

Can Blood Tests for Pregnancy Be Wrong? - ConceiveEasy

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


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.


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.


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.


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.


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.


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Maureen Stephens, BS, RN | Fertility Specialist ConceiveEasy 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: False Negative Pregnancy Tests Types of Pregnancy Tests Are Home Pregnancy Tests Accurate? Medications That Cause False Positive Pregnancy Tests Blood Tests for Infertility 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]please wait...Rating: 3.0/5 (2 votes 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]please wait...Rating: 2.0/5 (1 vote 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]please wait...Rating: 5.0/5 (1 vote 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]please wait...Rating: 3.0/5 (1 vote 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]please wait...Rating: 1.0/5 (1 vote 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]please wait...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]please wait...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]please wait...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]please wait...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]please wait...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]please wait...Rating: 3.0/5 (1 vote 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]please wait...Rating: 0.0/5 (0 votes cast) cag


Have you considered a thyroid test? VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) rufina dsouza


Hi I am 28 years old, I have had an ectopic pregnancy in June 2014. After which I have got my periods on time exactly on 24th of June, 25th July, 25th Aug. But in september I missed my periods it got my periods on 4th October a delay of 8 days. I had a HCG test done on the 29th september it was 1.20 mlU/ml. I am today getting a little pain near my left tube. Can it be an ectopic again VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) April Marie McIntyre


I come from a family where even blood tests can be false positives at any point in pregnancy. Upon research I have found that I am NOT ALONE! there are MANY women who have gone their ENTIRE pregnancy without a positive HCG test only by ultrasound could they prove they were not nuts! I have a rolling around visibly moving pregnancy that by my best educated guess I am about 27 weeks 9 years post tubal ligation my aunt was 7 months before they found my cousin by Ultrasound AND I have a friends aunt who NEVER had a blood test come up positive with her son either! False pregnancy can happen, but so can no HCG detectable ones! I did not WANT to be pregnant at 31 having had my spine fused at 29 due to a back injury having my younger daughter facial presentation vaginally. I feel happy but scared to death. I just quit denying that I must be pregnant about 6 weeks ago, and when I admitted it had several people tell me they could tell 2 or 3 months ago . VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) maria


Hi i just recent had unprotected sex, n few weeks after i been feeling really sick, the blood test was neg so i got the depo injection for contraception n still feel bloated ,nauseous n always hungry n tired n faint. But also still havnt got my period. Is it possible i may be pregnant. VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) Belle


I took a pregnancy test 10 days after unprotected sex and I had a negative. then after few days I felt pregnancy symptoms so decided to take a PT the following day and had a positive result. we went to an OB and she made me took a PT but negative result. I m confused. Am I pregnant or not? VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) becca


I stopped taking birth control in November and it is January and I have not had a period. Also I have been having all the pregnancy symptoms. Yesterday I had one positive one negative urine test and a negative blood test .what could be going on with my body? VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) Sjmas


There is so much stupid on the facebook page you mention. I wanted to read it all however I had to take my unicorn to the vet. VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) Smk


I miscarried Aug 24th . I kept having a positing blood pregnancy test but negative urine. My levels went from 68-46-28-12 and then slowly went back up again to 24.7 then back down again to 12.4 . I have had several miscarriages over the years and this has never happen . They are testing for Phantom HCG . For the past year After my tubal pregnancy around my monthly cycle I get a little light headed !often nauseous then when I m on it it last a few days and goes away . Doctors have no clue why !! Any ideas ??And My hormone test came back normal VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) keerti


hello DR My IVFdone two times .Second time my beta hcg test come positive after 8 days of FET.After next seven days my beta hcg shows negative result. plzz help me. how its possible? VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) Sybil


I had a positive urine test at home and many negatives to follow went to the doctor 3 days later and got a positive blood test with two negatives to follow. Woke up Sunday morning to bright red bleeding and cramps. I went to the ER tested Negative and went home I later that passed a 2 inch long bloody thing and continued bright red bleeding through the next day which turned to pink mucous. What are your thoughts on this? VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) Sara Abbott


Hi i had a 1 hcg level aug 14th 2015 but i took 2 test today urine and both positive also had 2 periods in july also Aug 1st was my last period could the blood test been wrong? VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) Kaci


I had a blood test done and pee test. But I haven t had my period for almost 3 months. VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) Shaun


as told I was pregnant with an hcg level of 60%. After two days it did not increase which concerned doctors. I was released and told to follow up with a gyn asap. Since then have had TWO normal periods. Am I even pregnant? What is going on? My dr said hcg cannot be produced without being pregnant so Im confused as to what s going on VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) Allie


I had a blood test done for pregnancy and it came out positive but I just don t believe in am pregnant because they saw no baby on a ultrasound Could I just be super early in my pregnancy or could it be faulse? VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) Estela M.


i know this is an old post, but what was the result, a baby on the way or negative test result VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) Jessica Corkins


I had 2 home tests positive and one done at the health department whuvh was positive, then 3 days ago I started what seemed like my period. N I thought I was having a miscarrege, went to the hospital. And they did a blood and urine. Test and they both came back negative. . whatsnhoin on? Help!?? VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) cheeky


What will be causing you to have sighns of being pregnant but u done a pee test and a blood test and they both come back negative VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) cheeky


Can you still end up getting pregnancy pains if u ain t pregnet VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) cheeky


What dose it mean if you get pregnantcy pains and you go to the doctor for a blood test and the test comes back negative can u still be pregnet VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) Renae


I had a complete hysterectomy last July and last Monday I went to the ER and even told the doctors that I had no equipment to even become pregnant but they still did a blood pregnancy test. I was looking at my chart today and saw that they had done this and burst out laughing and said sarcastically I wonder what the results were. I click to find the obvious negative but was extremely surprised that it showed positive. So yep, blood tests can show wrong too. My hcg count was 34, so now I m freaking out wondering what on earth is wrong with me. VA:F [1.9.20_1166]please wait...Rating: 0.0/5 (0 votes cast) Oluwakemisola Oketunde


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