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How Long After Intercourse Can A Pregnancy Test Be Taken?

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Posted on Mon, 18 Jan 2016
Question: how soon after having sex can you get blood work done to test if your pregnant?
doctor
Answered by Dr. Panagiotis Zografakis (1 hour later)
Brief Answer:
10-14 days after conception

Detailed Answer:
Hello,

the first signs of pregnancy do not follow the date of the sexual contact. They follow the date of conception which coincides with the date of ovulation. The date of ovulation cannot be predicted. It comes 14 days before the first day of your period, which means that you only know when you had your ovulation in the past but you can't say for sure about the next ovulation because the time from the first day of the period to the ovulation may vary. Women with a stable cycle can fairly accurately predict it. For example a woman with a cycle of 28 days will ovulate 14 days after the start of her period. This means that having sex after a week or so from her period to 2 weeks later may get her pregnant. The fertile days can from 5-6 days before ovulation to up to 24 hours later, so it all adds up to about one week per cycle.

I hope this is clear enough!

Kind Regards!
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
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Follow up: Dr. Panagiotis Zografakis (19 hours later)
hey it didn't let me respond to the other but I'm curious if a yeast infection can give a false positive?
doctor
Answered by Dr. Panagiotis Zografakis (2 hours later)
Brief Answer:
No...

Detailed Answer:
A yeast infection is not supposed to cause false positives. Beta-hCG may rise in various cases though (besides pregnancy I mean) including miscarriage, mole pregnancy, tumors... If for example you got pregnant earlier and you had a miscarriage then the beta-hCG levels might have been still high and detectable by the pregnancy test.

Do the quantitative blood test and repeat it after a week or so to see if the levels are rising. If they do, then pregnancy is likely.

Kind Regards!
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
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Follow up: Dr. Panagiotis Zografakis (33 minutes later)
okay curious cuz I can tell I have one but I made an appointment for monday
doctor
Answered by Dr. Panagiotis Zografakis (24 minutes later)
Brief Answer:
just do the blood test

Detailed Answer:
I see... Doing the quantitative blood test will clarify the issue.
Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
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Follow up: Dr. Panagiotis Zografakis (1 minute later)
okay
doctor
Answered by Dr. Panagiotis Zografakis (40 minutes later)
Brief Answer:
you can upload the results when you do

Detailed Answer:
If you'd like, you can upload the results when you do the test. I'll be glad to comment on the results.

Kind Regards!
Note: For further follow up on related General & Family Physician Click here.

Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
doctor
Answered by
Dr.
Dr. Panagiotis Zografakis

Internal Medicine Specialist

Practicing since :1999

Answered : 3809 Questions

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How Long After Intercourse Can A Pregnancy Test Be Taken?

Brief Answer: 10-14 days after conception Detailed Answer: Hello, the first signs of pregnancy do not follow the date of the sexual contact. They follow the date of conception which coincides with the date of ovulation. The date of ovulation cannot be predicted. It comes 14 days before the first day of your period, which means that you only know when you had your ovulation in the past but you can't say for sure about the next ovulation because the time from the first day of the period to the ovulation may vary. Women with a stable cycle can fairly accurately predict it. For example a woman with a cycle of 28 days will ovulate 14 days after the start of her period. This means that having sex after a week or so from her period to 2 weeks later may get her pregnant. The fertile days can from 5-6 days before ovulation to up to 24 hours later, so it all adds up to about one week per cycle. I hope this is clear enough! Kind Regards!