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Doctor insights on: Can It Be Too Early For A Blood Pregnancy Test

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Is two or three weeks after sex too early for a blood pregnancy test? I got one at the drs office last week and it was negate could i still be pregnat

Is two or three weeks after sex too early for a blood pregnancy test? I got one at the drs office last week and it was negate could i still be pregnat

No: Blood tests are sensitive within a few days after implantation. If you had a blood test at least 20 days after sexual encounter, then you are unlikely to be pregnant. ...Read more

Dr. Chevies Newman
1,113 doctors shared insights

Premature (Definition)

Very premature is a condition in which a baby is delivered between 28 and 31 weeks' gestation. Depending on how premature, how sick, and how lucky or unlucky a baby is, he can get brain problems, cerebral palsy, blindness, deafness, developmental problems, learning disabilities, severe lung diseases, infection and loss of some intestines, etc... Babies who are only moderately premature usually ...Read more


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Can a blood pregnancy test be wrong if done too early?

Can a blood pregnancy test be wrong if done too early?

Yes: Beta HCG is measured in both blood and urine and is usually detected between 6-12 days after fertilization when implantation occurs. A quantitative bhcg can measure very low levels of bhcg but the typical qualitative blood test usually turns positive at a higher level and is not always better than the urine test. So to be sure you might want to retest some days later. ...Read more

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Can anything affect a blood pregnancy test besides from testing too early?

Can anything affect a blood pregnancy test besides from testing too early?

Heterophile antibody: Presence of heterophile antibodies can affect results of blood tests for many items. It usually does not affect the urine test. If you miss your period by 4-5 days, do a home pregnancy test. If the result is negative repeat the test 4-5 days later unless you get a period by then. Use first morning urine and follow the instructions for the test carefully. If you do not wish to be pregnant, use contraception all the time, every time. You may consider implanted contraceptive, or IUD. Practice safe sex. Get HPV vaccine. ...Read more

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Stopped birth control a month ago. Got a neg blood pregnancy test. My period is a week late. Could I still be pregnant and tested too early?

Stopped birth control a month ago. Got a neg blood pregnancy test. My period is a week late. Could I still be pregnant and tested too early?

Maybe: You did not say when exactly in your cycle that you did a pregnancy test. But it is always a good idea to retest a week later. The first time should be first morning urine after your missed period. ...Read more

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How early can you take a blood pregnancy test?

How early can you take a blood pregnancy test?

More reliable if...: A urine pregnancy test can be taken any time, but it gives a reliable result about 3 weeks after sex (when conception might have occurred), or 1 week after missing a period. ...Read more

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If you wait too and a three weeks after sex to have a blood pregnancy test done is that to early?

If you wait too and a three weeks after sex to have a blood pregnancy test done is that to early?

Take a test: Home pregnancy tests are very accurate. They are the same tests used in a doctors office. They can detect a pregnancy 7-10 days after conception. The best time to take one is when you miss your period. If you doubt the result you can repeat it in 1-2 days. If you were pregnant the hormone level would rise enough for detection. ...Read more

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Do you usually need an appointment for a blood pregnancy test at a gyn dr? How early can you have it done?

See below: Blood test for pregnancy can be positive as soon as a day after a missed period. Whether you need an appointment or not would depend on your doctor, there are no hard and fast rules on that. ...Read more

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This month i started my period a day early but it lasted 2 days. So i went for a blood pregnancy test and it neg. What could it be?

This month i started my period a day early but it lasted 2 days. So i went for a blood pregnancy test and it neg. What could it be?

Trust the test: Home pregnancy tests are very accurate. They are the same tests used in a doctors office. They can detect a pregnancy 7-10 days after conception. The best time to take one is when you miss your period. If you doubt the result you can repeat it in 1-2 days. If you were pregnant the hormone level would rise enough for detection. ...Read more

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Can a blood pregnancy test be wrong?

Only if: the test is done too early, or (obviously) if the test is defective or run incorrectly. ...Read more

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When is a blood pregnancy test accurate?

When is a blood pregnancy test accurate?

About 8 days after: Blood HCG tests detect levels very soon after embryo implantation starts. The embryo usually start implanting at about 7 days after conception. So a day later blood HCG levels will start to go up. Urine tests usually turn positive at 10 days after conception. They are slightly less sensitive than blood tests. ...Read more

Dr. Tanya Russo
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


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