Could She Be Pregnant? Risks After Unprotected Intercourse - Obstetrics and Gynecology

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Your girlfriend's last menstrual period started on November 11, and you had unprotected intercourse on December 3, but there was no ejaculation.
She then got her period again on December 15.
Recently, she has started to notice a small amount of bleeding.
Based on this information, the likelihood of pregnancy appears to be low, especially since she had a regular menstrual period after the unprotected intercourse.
However, if there are concerns about pregnancy or changes in her menstrual cycle, it would be advisable for her to take a pregnancy test or consult a healthcare professional for further evaluation.

Niming, 10~19 year old female. Ask Date: 2016/01/01

Dr. Lin Wenbin reply Obstetrics and Gynecology


Having unprotected intercourse increases the chance of pregnancy.

Reply Date: 2016/01/01

More Info


When considering the possibility of pregnancy after unprotected intercourse, it is essential to understand the timing of ovulation, the menstrual cycle, and the nature of the sexual activity that occurred. In your case, your girlfriend had her last menstrual period on November 11 and had unprotected intercourse on December 3. Given that the average menstrual cycle is about 28 days, ovulation typically occurs around 14 days after the first day of the last period. This means that ovulation would likely have occurred around November 25, making December 3 a time when she could have been fertile, depending on her individual cycle.

The fact that she had her period on December 15 suggests that she likely was not pregnant, as a typical menstrual cycle would not include a period if pregnancy had occurred. However, the occurrence of light bleeding a few days before her expected period could be due to several factors, including hormonal fluctuations, stress, or even the onset of her menstrual cycle. It is also important to note that some women experience spotting or light bleeding during ovulation or even early pregnancy, but given the timeline and the subsequent period, the likelihood of pregnancy seems low.

If there is still concern about the possibility of pregnancy, it is advisable for her to take a home pregnancy test. These tests are most accurate when taken after a missed period, but they can sometimes detect pregnancy a few days before the expected period. If the test is negative and she continues to experience unusual bleeding or other symptoms, it would be wise for her to consult a healthcare provider for further evaluation.

In summary, based on the information provided, the likelihood of pregnancy appears low, especially since she had a normal menstrual period following the unprotected intercourse. However, if there are any uncertainties or if she experiences any unusual symptoms, seeking medical advice is always a prudent step.

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