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Doctor insights on: Pregnancy Blood Test

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How does a pregnancy blood test work?

How does a pregnancy blood test work?

HCG level: The embryo, after implantation in the uterus, makes human chorionic gonadotrophic hormone (HCG). Both blood and urine pregnancy tests depend on detecting HCG, a marker of pregnancy ...Read more

Dr. Pamela Pappas
4 doctors shared insights

Pregnancy (Definition)

When your due date arrives, you will be more than ready to have your baby! Most women deliver the baby somewhere between 37 and 42 weeks. According to the American College of Obstetricians and Gynecologists, only 5% of babies arrive on the exact due date. Approximately 7% of babies are not delivered by 42 weeks, and when that happens, it is referred to ...Read more


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What does a satisfactory pregnancy blood test mean ?

What does a satisfactory pregnancy blood test mean ?

Not Medical: That term is not one used in medicine nor is it in any way explanatory. Perhaps you should ask this specific question of the professional who used it. ...Read more

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Are there two types of pregnancy blood test? And what's the difference?

Are there two types of pregnancy blood test? And what's the difference?

Yes: Both tests check to see whether the pregnancy hormone, known as HCG (human chorionic gonadotropin) is present. The qualitative HCG simply gives a result as to whether any HCG is present or not. The quantitative HCG test actually measures the level of the HCG in the blood. This can be helpful in diagnosis of abnormal pregnancies such as ectopic, molar, or miscarriage. ...Read more

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What should my levels be for a pregnancy blood test to show im pregnant too them?

What should my levels be for a pregnancy blood test to show im pregnant too them?

Testing: You are asking the wrong question. HCG increases daily after a viable pregnancy is old enough to be big enough to have blood and chemicals. That transition occurs at about ten days post conception. It also corresponds with the time a period is due and it stops the period leading to a missed period and the first real symptom of early pregnancy. That is the sign to look for to know when to test. ...Read more

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Is it possible to take a pregnancy blood test to soon and still get a negative result?

Is it possible to take a pregnancy blood test to soon and still get a negative result?

Yes: Blood tests can be done soon after conception (8-9 days after). It's best to wait until after your first missed period to test with he urine pregnancy tests. Be sure to accurately follow the directions to get a valid result. Other causes of false negative tests are not using first urine of the morning and drinking too much water before testing. Hope this helps. ...Read more

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If my girlfriend take the pregnancy blood test to soon is it possible she can still get a negative result?

If my girlfriend take the pregnancy blood test to soon is it possible she can still get a negative result?

Takes 6-12 days: Yes, it takes 6-12 days for the test to become positive. She should wait at least one week after intercourse before doing a pregnancy test. If it is still negative after 2 weeks, you can rest assured she is not pregnant from any sexual encounter from at least 2 weeks prior. ...Read more

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I took a pregnancy blood test last week it came out positive, then this week redid another blood test it came out negative why.

I took a pregnancy blood test last week it came out positive, then this week redid another blood test it came out negative why.

Chemical pregnancy: It is possible that an early pregnancy was lost spontaneously. About 25% of early pregnancies are lost, usually due to chromosomal defects in the embryo. Many times the only manifestation is a delayed and/or heavy period. ...Read more

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Pregnancy blood test came back at 25 mi/mu. What does that mean? How far along is that. Was told negative then said to be postitive. Which is it?

Pregnancy blood test came back at 25 mi/mu. What does that mean? How far along is that. Was told negative then said to be postitive. Which is it?

It is positive: Blood pregnancy tests ( HCG level) can detect HCG earlier in a pregnancy than urine or home pregnancy tests can. These tests can confirm a pregnancy about 8 to 10 days after ovulation. Blood pregnancy tests will yield a positive result if they detect 5 miu or more of HCG in the blood. ...Read more

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How soon after sex can I get a pregnancy blood test ?

How soon after sex  can I get a pregnancy blood test ?

Depends on the cycle: Pregnancy test blood or urine only becomes positive after implantation, that is when fertilized egg has attached to the wall of uterus it takes 6to12 days after ovulation average time 9days so if you are pregnant blood pregnancy test becomes positive 3to4 days after implantation or 10to11 days after fertilization and ovulation it all depends what time during your menstrual cycle you have sex. ...Read more

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If i ovulate on sept 2, when is the SOONEST i can do pregnancy blood test? Thank you for the answer

If i ovulate on sept 2, when is the SOONEST i can do pregnancy blood test? Thank you for the answer

Patience...: Patience is a virtue that all parents and future parents should seek. A urine pregnancy test done correctly should give a reliable result 3 weeks after sex. A blood test is not needed. Hopefully, it will be what you wish it to be, but there should be no need to give it another thought until then. If one's normal regular menstrual period comes, she is not pregnant and a test is not needed. ...Read more

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I took a pregnancy blood test at 9 DPO and it was negative, is there a chance I could still be pregnant?

I took a pregnancy blood test at 9 DPO and it was negative, is there a chance I could still be pregnant?

Maybe: It could have been too soon. Take it again when you have missed period for 2 days, if the test says it is accurate by then. Follow the instructions exactly! If negative, repeat in a week. If still negative & no period, consider seeing doc for blood pg test. Also, assume you're pregnant until sure you're not & no drugs, alcohol, tobacco, any otc meds or drugs not okayed by doc, Prenatal vit.s OK. ...Read more

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If someone ovulates and concieves and then a week later takes a pregnancy blood test, how accurate will that be?

If someone ovulates and concieves and then a week later takes a pregnancy blood test, how accurate will that be?

Not if it's negative: A positive test is pretty accurate, but a negative test is not reliable that early. It can take 11 days after conception to show a positive blood test result. To make it more complicated, since sperm can live for up to 5 days inside a woman, and ovulation is sometimes difficult to pinpoint exactly, she can conceive later than she thought, and need to wait longer for a positive result. ...Read more

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Hi I went for a pregnancy blood test but it came back negative and I have been taken early first response test and all 6 came back with lightpinkfaint?

Hi I went for a pregnancy blood test but it came back negative and I have been taken early first response test and all 6 came back with lightpinkfaint?

Blood test: If you missed a period before the blood test, and the result was negative, you are unlikely to be pregnant. For urine tests you need to follow the instructions carefully, including the time within which the result should be read. ...Read more

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Can a pregnancy blood test be done too early ?

Can a pregnancy blood test be done too early ?

Yes: Conception occurs within day or so of the sex. It takes about 3 weeks for the embryo to make enough HCG for a positive pregnancy test. Blood test may be done a day after a missed period. Home pregnancy tests should be done 4-5 days after the missed period. If the result is negative repeat the test in 4-5 days. Use first morning urine and follow instructions for the test carefully. ...Read more

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If my pregnancy blood test is weakly positive, am i pregnant?

No such thing: You can not be weakly positive, or a little pregnant. It is either positive or negative. Odds are, it is positive. If you are not sure how to read the test, wait a day or two and repeat it with a test that has 1 line or 2 or turns a definitive color, etc. So you have no question as to the answer. Good luck. ...Read more

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Can you still get a pregnancy blood test done, if you're bleeding?

Can you still get a pregnancy blood test done, if you're bleeding?

You can: But the utility of a pregnancy test in this setting is more so to assess for the possibility of a spontaneous abortion. Remember, spotting during pregnancy, especially the first trimester is rather common. I would say though, if you urine pregnancy testing is negative, the odds that this is pregnancy related bleeding goes way down. ...Read more

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Can i go for pregnancy blood test 7 days after 10, 000 ui pregnyl shot ?

To early: You would be testing too early and may test negative even if a pregnancy is there. You should wait at least 2 weeks since HCG injection for more accurate results. Good luck. ...Read more

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How soon i can make pregnancy blood test after intercourse to know if positive or not ?

How soon i can make pregnancy blood test after intercourse  to know if positive or not ?

Pregnancy test: Accuracy of pregnancy tests do not rely on when you had intercourse rather when the test is performed in relationship to your expected menstrual cycle. Blood pregnancy test can detect if pregnant several days before missing your cycle. Accuracy will increase at the time of missed menses. ...Read more

Dr. Stephen Sudler
482 doctors shared insights

Pregnancy Test (Definition)

A pregnancy test measures a hormone called human chorionic gonadotropin (HCG). HCG is a hormone produced during pregnancy. It appears in the blood and urine of pregnant women as early as ...Read more