Pregnancy Tests: What to Do After Negative Results? - Obstetrics and Gynecology

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Is pregnancy testing accurate?


Hello doctor, I would like to ask about my situation.
After having sexual intercourse on December 13, I took pregnancy tests on January 1, January 8, and January 15, all of which were negative.
I then visited a gynecologist, where I had an ultrasound and a pregnancy test, and the doctor confirmed that I was not pregnant and prescribed medication to induce my period.
After taking the medication, I experienced bleeding seven days later (on February 14), but it was lighter than my usual menstrual flow.
Now, my period has not yet arrived.
Is there a possibility that I could be pregnant?

Niming, 20~29 year old female. Ask Date: 2016/03/28

Dr. Tian Yiwen reply Obstetrics and Gynecology


If December 13 was indeed the last sexual intercourse, the chances of pregnancy are low.

Reply Date: 2016/03/28

More Info


Hello! Thank you for your question regarding the possibility of pregnancy after multiple negative pregnancy tests and subsequent medical evaluations. Based on your description, it seems you have had a series of negative pregnancy tests following unprotected intercourse on December 13, with tests conducted on January 1, January 8, and January 15 all returning negative results. Additionally, you visited a gynecologist who performed an ultrasound and confirmed that there was no pregnancy, prescribing medication to induce menstruation.

Given this context, it is important to understand how pregnancy tests work and the factors that can influence their accuracy. Home pregnancy tests typically detect the hormone human chorionic gonadotropin (hCG), which is produced shortly after a fertilized egg attaches to the uterine lining. The levels of hCG can vary significantly in early pregnancy, and it is usually detectable in urine about 14 days after conception. However, if the tests are taken too early, they may yield false negatives.

In your case, since you have taken multiple tests over a span of several weeks, and all have returned negative results, it is unlikely that you are pregnant. The ultrasound performed by your gynecologist would have provided additional confirmation, as it can detect a pregnancy much earlier than a home test, especially if there are any signs of an early pregnancy.

The fact that you experienced lighter bleeding after taking the medication prescribed by your doctor could indicate that your body is responding to the hormonal treatment. It is not uncommon for menstrual cycles to be irregular or for bleeding to be lighter than usual after taking medication to induce menstruation. This can happen due to hormonal fluctuations, especially if your cycle was already irregular prior to this.

However, if you are still concerned about the possibility of pregnancy or if your menstrual cycle does not return to normal within a reasonable timeframe, it would be advisable to follow up with your healthcare provider. They may recommend further testing or evaluation to rule out any underlying issues that could be affecting your menstrual cycle.

In summary, based on the information provided, it seems unlikely that you are pregnant given the negative tests and medical evaluations. However, if you continue to experience unusual symptoms or have concerns, seeking further medical advice is always a good step. It is essential to maintain open communication with your healthcare provider about any changes in your body and to discuss any worries you may have regarding your reproductive health.

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