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how long after sex is blood pregnancy test accurate

A 26-year-old female asked:
Dr. Robert Kwok
32 years experience Pediatrics
Yes: Three weeks after sex is long enough for a pregnancy test to show whether or not a woman got pregnant 3 weeks ago.
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A 18-year-old female asked:
Dr. Laura Anissian
20 years experience Internal Medicine
Early: This may be too early but often it can be positive. If it is negative, I would check another test in one week.
A 26-year-old female asked:
Dr. Anne Hale
Dr. Anne Hale answered
Specializes in Obstetrics and Gynecology
Yes: Yes it should be accurate. I have seen a few women who are pregnant and the test is negative for a while. If you are still doubting the results then ... Read More
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A 29-year-old female asked:
Dr. Robert Killian
27 years experience General Practice
Missed Period: Probably if you have also missed a period. If you have not missed a period yet you tested too soon.
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A 26-year-old female asked:
Dr. Stuart Hickerson
31 years experience Family Medicine
Acurate: The test is almost 100 percent .
A 37-year-old member asked:
Dr. Valentin Drezaliu
19 years experience Obstetrics and Gynecology
5-6 days earliest: 5-6 days earliest.
A 48-year-old member asked:
Dr. Josephine Ruiz-healy
38 years experience Pediatrics
Depends: Home pregnancy tests measure the amount of beta human Chorionic Gonadotropin hormone in urine. It takes about 1 week after conception for beta HCG to ... Read More
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A 23-year-old female asked:
Dr. Robert Kwok
32 years experience Pediatrics
Yes: A urine pregnancy test, done correctly, gives a reliable result 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after ... Read More
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A 24-year-old male asked:
Dr. Luis Gonzalez
38 years experience Obstetrics and Gynecology
Soon: Modern urine pregnancy tests will be positive a few days before your period is due !
A 26-year-old male asked:
Dr. Robert Killian
27 years experience General Practice
Pregnancy Testing : 100%.
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A female asked:
Dr. Gurmukh Singh
48 years experience Pathology
After missed period: Conception, as defined by the generation of a fertilized ovum, occurs within day or so of the sex. However, it takes about two weeks for the embryo to ... Read More
A 29-year-old female asked:
Dr. Gurmukh Singh
48 years experience Pathology
Yes: Both blood and urine tests being negative at 72 days is accurate in ruling out pregnancy.
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A 46-year-old member asked:
Dr. Colin Kerr
43 years experience Family Medicine
Pregancy test: Pregnancy tests (urine) don't turn positive until approximately 2 weeks after fertilization of the egg, which may take days after the act of sex. If y ... Read More
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A 30-year-old female asked:
Dr. Anne Phelan-adams
Specializes in Family Medicine
Fairly soon: The test you're referring to is the Nucleic Acid Amplification Test or NAAT. It's very good at detecting the DNA of chlamydia in the urine even at lo ... Read More
A 27-year-old male asked:
Dr. Wayne Ingram
Specializes in Obstetrics and Gynecology
If positive, yes: If the results were positive, then yes they are accurate.
A 45-year-old member asked:
Dr. Joel Rivera Jimenez
17 years experience Obstetrics and Gynecology
Pregnancy: Great majority of pregnancies occur when coitus takes places within the 3 day interval just prior to ovulation. The first hormonal evidence of implant ... Read More
A 26-year-old female asked:
Dr. Marvin Ott
19 years experience Emergency Medicine
Depends: on the timing of the intercourse with relation to your period, the brand of test, and if the test was used correctly. If you got a negative result an ... Read More
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A 34-year-old female asked:
Dr. Raj Syal
Dr. Raj Syal answered
32 years experience Obstetrics and Gynecology
Very accurate: You should be able to trust the results.
A 39-year-old female asked:
Dr. Yury Geylikman
30 years experience Orthodontics
About 14 days: About 14 days into the pregnancy.
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A 48-year-old member asked:
Dr. Mazin Abdullah
14 years experience Fertility Medicine
Very: Very accurate.
A 23-year-old female asked:
Dr. Robert Killian
27 years experience General Practice
You are not pregnant: Yes. Of course. A negative at that point is negative.
A 25-year-old female asked:
Dr. Robert Killian
27 years experience General Practice
Back to high school: If you were sexual during ovulation and got pregnant then testing starting the morning after the first day of a missed period should be valid.
A 32-year-old female asked:
Dr. David Howard
40 years experience Gynecology
See details: That would depend on the test. Some tests can detect a pregnancy several days before the miss period. The product should list how soon it is capable ... Read More
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90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more. Get help now:

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