Is It Menstruation or Pregnancy? Unusual Bleeding - Obstetrics and Gynecology

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Menstruation or pregnancy?


Hello Doctor: My last menstrual period started on August 29.
I had intercourse with my husband on September 11 and September 18.
On September 22, I began to experience bleeding, but it is much lighter than my usual period and is dark brown in color.
Today marks the fifth day of this bleeding, and I am unsure whether it is my period or a sign of pregnancy.
Thank you!

Miss Lin, 30~39 year old female. Ask Date: 2016/09/26

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, if you are wondering whether you are pregnant, it could also be premenstrual bleeding.
If your period is late, it is advisable to consult a gynecologist.
Wishing you good health.

Reply Date: 2016/09/26

More Info


When faced with unusual bleeding after a missed period, it can be challenging to determine whether it is menstruation or an early sign of pregnancy. In your case, the timeline you provided indicates that your last menstrual period started on August 29, and you had sexual intercourse on September 11 and 18. The bleeding began on September 22, which is approximately three weeks after your last period and could potentially be related to either menstruation or early pregnancy.

1. Understanding the Nature of the Bleeding: The dark brown color of the blood you are experiencing is often associated with older blood, which can occur during menstruation or implantation bleeding. Implantation bleeding can happen when a fertilized egg attaches to the lining of the uterus, typically occurring around 6 to 12 days after conception. This type of bleeding is usually lighter and shorter in duration compared to a regular menstrual period.

2. Pregnancy Testing: If you suspect you might be pregnant, it is advisable to take a home pregnancy test. These tests are most accurate when taken after a missed period. If the test is positive, it is a strong indication of pregnancy. If it is negative but you still suspect pregnancy, consider retesting in a few days or consulting a healthcare provider for a blood test, which can detect pregnancy earlier than urine tests.

3. When to Seek Medical Attention: If the bleeding continues, becomes heavier, or is accompanied by severe pain or other concerning symptoms (such as dizziness or fainting), it is crucial to seek medical attention. These could be signs of a miscarriage or an ectopic pregnancy, both of which require immediate medical evaluation.

4. Possible Causes of Unusual Bleeding: Aside from pregnancy, there are several other reasons for unusual bleeding, including hormonal imbalances, stress, changes in weight, or underlying medical conditions such as polycystic ovary syndrome (PCOS) or fibroids. It is essential to consider these factors, especially if you have a history of irregular periods.

5. Monitoring Symptoms: Keep track of your bleeding pattern, including the color, consistency, and any associated symptoms. This information will be helpful for your healthcare provider in determining the cause of your bleeding.

6. Consulting a Healthcare Provider: Given the uncertainty surrounding your symptoms, it is advisable to consult a healthcare provider. They can perform a physical examination, conduct necessary tests, and provide guidance based on your specific situation.

In conclusion, while the dark brown bleeding you are experiencing could be related to either menstruation or early pregnancy, it is essential to monitor your symptoms closely and consider taking a pregnancy test. If you have any concerns or if the bleeding persists, do not hesitate to seek medical advice. Early intervention can help address any potential issues and provide you with peace of mind.

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