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Dr. Andrew Rynne
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Dr. Andrew Rynne

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Suggest Possible Tests To Confirm Pregnancy

Hello I'm Joel
my girlfriend, after having 1 week period delay, took a pregnancy test, which resulted positive. However, 2 weeks later she blood-checked in a hospital and the resulted NOT pregnant. Though her period didn't come yet, I wasn't given any clear answer from the hospital, please help! thank you
posted on Thu, 13 Mar 2014
Twitter Thu, 7 Jan 2016 Answered on
Twitter Thu, 7 Jan 2016 Last reviewed on
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Radiologist,  's  Response
Hi,
Thanks for writing in.

1. Home pregnancy test is by estimating the beta subunit of hCG in urine. This is positive after 15 days from sex if pregnancy has happened. However there are some limitations when the result can be false positive and pregnancy has not occurred.

2. The blood beta subunit of hCG estimation is done in the hospital and this is accurate. This usually is a quantitative estimation and not wrong. Therefore if they have measured beta subunit of hCG in blood and it is negative then pregnancy is not a probability and the home pregnancy test is false positive.

3. If in doubt then you can go for a transvaginal ultrasound after 6 to 7 weeks from the last menstrual periods and this will most likely show a pregnancy. Please discuss with your doctor in detail and request for an ultrasound scan if required. Please do not worry.
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Suggest Possible Tests To Confirm Pregnancy

Hi, Thanks for writing in. 1. Home pregnancy test is by estimating the beta subunit of hCG in urine. This is positive after 15 days from sex if pregnancy has happened. However there are some limitations when the result can be false positive and pregnancy has not occurred. 2. The blood beta subunit of hCG estimation is done in the hospital and this is accurate. This usually is a quantitative estimation and not wrong. Therefore if they have measured beta subunit of hCG in blood and it is negative then pregnancy is not a probability and the home pregnancy test is false positive. 3. If in doubt then you can go for a transvaginal ultrasound after 6 to 7 weeks from the last menstrual periods and this will most likely show a pregnancy. Please discuss with your doctor in detail and request for an ultrasound scan if required. Please do not worry.