Should You Test for Pregnancy Again or See a Doctor?

I'm not sure about the accuracy?

On December 9th, I had unprotected intercourse, and on December 26th, the pregnancy test showed only one line.
I later found online that it's best to test 18 days after intercourse for more accurate results.
Additionally, my period was due on December 24th but hasn't arrived.
Should I test again, or should I go see a doctor directly?

Zheng, 20~29 year old female. Ask Date: 2015/12/28

Dr. Lü Lizheng reply Obstetrics and Gynecology

The response indicates that pregnancy is unlikely.
To ensure peace of mind, you may consider taking another test.
Sincerely, Dr.
Li-Cheng Lu, Taoyuan Hospital.

Reply Date: 2015/12/28

More Info

When it comes to determining whether you should retest for pregnancy or see a doctor, there are several factors to consider based on your situation. Given that you had unprotected intercourse on December 9 and your period was due on December 24 but has not arrived, it is reasonable to suspect that you might be pregnant.
Firstly, the timing of your pregnancy test is crucial. Most home pregnancy tests are designed to detect the hormone hCG (human chorionic gonadotropin) in your urine, which typically becomes detectable about a week after a missed period. Since your period was due on December 24 and you tested on December 26, it is possible that the hormone levels were not high enough to be detected yet, especially if you ovulated later than expected.
The recommendation to wait at least 18 days after potential conception before testing is based on the fact that it allows enough time for hCG levels to rise sufficiently for detection. Since you are now a few days past your expected period, it would be advisable to take another home pregnancy test. Make sure to follow the instructions carefully, and consider using the first morning urine for the most accurate results, as it tends to have the highest concentration of hCG.

If the second test is still negative and your period does not arrive, it would be wise to consult a healthcare provider. There are several reasons why you might miss your period, including stress, hormonal imbalances, or other medical conditions. A doctor can perform a more sensitive blood test to check for pregnancy and evaluate any underlying issues that may be affecting your menstrual cycle.

In summary, I recommend that you take another pregnancy test now that you are a few days past your expected period. If the result is negative and your period still does not come, or if you have any other concerning symptoms (such as severe pain or unusual discharge), you should definitely see a doctor for further evaluation. They can provide you with more definitive answers and help you understand what might be going on with your body.
It's important to remember that while home pregnancy tests are generally reliable, they are not infallible. Consulting with a healthcare professional will give you peace of mind and ensure that you receive appropriate care based on your individual circumstances.

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