Can You Get Pregnant Right Before Your Period? Risks - Obstetrics and Gynecology

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Menstrual issues


If sexual intercourse occurs for the first time two days before the expected onset of menstruation, but menstruation does not arrive two days later, is there a possibility of pregnancy? Safe measures were taken during the process, and menstrual cycles have been consistently regular.

Hua Hua, 20~29 year old female. Ask Date: 2004/10/18

Dr. Zhou Dali reply Obstetrics and Gynecology


Hello Huahua: Based on your description, the likelihood of pregnancy from that particular sexual encounter is low.
However, since your period is delayed and you have regular sexual activity, you should consider the possibility of pregnancy from other sexual encounters.
If you have any concerns, please visit a nearby gynecology clinic for testing.

Reply Date: 2004/10/18

More Info


Yes, it is possible to get pregnant right before your period, although the likelihood is generally low. To understand this better, we need to consider the menstrual cycle and the timing of ovulation.

The menstrual cycle typically lasts about 28 days, but it can vary from person to person. Ovulation usually occurs around 14 days before the start of your next period. Sperm can live inside a woman's body for up to five days after intercourse, which means if you have sex in the days leading up to ovulation, there is a chance that sperm could still be viable when the egg is released.

If you had intercourse two days before your expected period, it is unlikely that you would conceive, especially if you have a regular cycle and are aware of your ovulation timing. However, if your cycle is irregular or if you have ovulated later than expected, there is still a possibility of pregnancy.
In your case, since you mentioned that you used protection during intercourse, this significantly reduces the chances of pregnancy. Condoms, for example, are effective at preventing both pregnancy and sexually transmitted infections when used correctly. However, no contraceptive method is 100% effective, and there is always a small risk of failure.

If your period does not arrive as expected, it is advisable to take a home pregnancy test. These tests are designed to detect the hormone hCG (human chorionic gonadotropin), which is produced after a fertilized egg implants in the uterus. Testing a few days after your missed period will provide the most accurate results.

If you find yourself in a situation where your period is late and the test is negative, it may be worth consulting with a healthcare provider. They can help determine if there are other factors at play, such as hormonal imbalances, stress, or other health issues that could affect your menstrual cycle.

In summary, while the chances of getting pregnant just before your period are low, they are not zero, especially if ovulation timing is uncertain. Using protection greatly reduces the risk, but if your period is late, taking a pregnancy test is the best course of action to confirm your status.

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Dr. Li Guanghan reply Obstetrics and Gynecology
If menstruation is regular, it is unlikely to conceive within the week prior to menstruation.

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Hello, doctor! I would like to ask, I had intercourse with my girlfriend two days before her period on June 12 without using a condom and without ejaculation. Her period started on June 14. Is there a chance of pregnancy in this situation?


Dr. Cao Guotao reply Obstetrics and Gynecology
Hello, if you have your period, you are unlikely to be pregnant. Wishing you good health.

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Hello, the questioner: There is a possibility of pregnancy even if ejaculation has not occurred during intercourse, as pre-ejaculatory fluid may contain sperm. It is recommended to check for pregnancy if your period is more than a week late. Thank you! Wishing you peace and healt...

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