Delayed Menstruation: Pregnancy Concerns Explained - Obstetrics and Gynecology

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Delayed menstruation?


Last month, my period started on September 3, with a menstrual cycle of 32 to 33 days.
I had sexual intercourse on the 12th of that month without a condom and there was no ejaculation inside.
On September 28, I used a pregnancy test without first morning urine, and it showed one line.
On September 29, I had sexual intercourse with a condom.
I tested again on October 8, and it still showed one line.
However, my period should have arrived four days ago.
Am I pregnant?

Xiao Yi, 10~19 year old female. Ask Date: 2015/10/09

Dr. Lü Lizheng reply Obstetrics and Gynecology


The response indicates that there is likely no pregnancy, just irregular menstruation.
Sincerely, Dr.
Li-Cheng Lu, Taoyuan Hospital.

Reply Date: 2015/10/09

More Info


Understanding delayed menstruation can be a source of anxiety, especially when considering the possibility of pregnancy. Based on the information you've provided, let's break down your situation and address your concerns.

Your last menstrual period began on September 3, and you typically have a cycle length of 32 to 33 days. This means that your next expected period would have been around October 5 to 6. Since you mentioned that your period is now four days late, it's understandable to wonder if you might be pregnant.

You had unprotected sexual intercourse on September 12, which is within your fertile window, as ovulation typically occurs about 14 days before your next period. However, you also noted that there was no ejaculation inside you, which reduces the likelihood of pregnancy, but does not eliminate it entirely. Sperm can survive in the female reproductive tract for several days, so it's still possible to conceive from that encounter.

You performed a home pregnancy test on September 28, which showed one line (indicating a negative result). You tested again on October 8, and again received a negative result. Home pregnancy tests are generally quite accurate, especially when taken after a missed period. However, testing too early can sometimes yield false negatives. Since you tested after your expected period and still received a negative result, it is less likely that you are pregnant.

There are several reasons for a delayed period that are not related to pregnancy. Stress, hormonal imbalances, changes in weight, and even certain medications can affect your menstrual cycle. If you have experienced any significant changes in your lifestyle or stress levels, this could be a contributing factor.

If your period does not arrive soon, or if you continue to have concerns about a possible pregnancy, it would be wise to consult with a healthcare provider. They can perform a blood test, which is more sensitive than a home pregnancy test and can provide a definitive answer regarding pregnancy. Additionally, they can help investigate other potential causes for your delayed menstruation.

In summary, based on the information you've provided, it seems unlikely that you are pregnant given the negative test results and the timing of your menstrual cycle. However, if your period does not come soon, or if you have any other symptoms or concerns, seeking medical advice is the best course of action. It’s important to take care of your mental and emotional well-being during this time, as uncertainty can be stressful.

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