9 Days Late: Your Menstrual Cycle and Possible Causes - Obstetrics and Gynecology

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Menstruation has been absent for 9 days?


Hello doctor, my period is 9 days late.
It is usually very regular.
My last menstrual period was from October 31 to November 6.
I was in a car accident on the 14th of last month and took anti-inflammatory and pain medication prescribed by the doctor.
I also had sexual intercourse on the night of the 14th.
What could be the reason for my situation?

Wanzi, 20~29 year old female. Ask Date: 2015/12/09

Dr. Lin Wenbin reply Obstetrics and Gynecology


You need to see a gynecologist for further examination.
Physical stress can also cause menstrual irregularities.

Reply Date: 2015/12/09

More Info


When it comes to a delayed menstrual cycle, particularly a delay of nine days, there are several factors to consider. Given your regular cycle and the recent events in your life, including the car accident and the medications you took, it’s essential to explore the potential causes of your missed period.

Firstly, stress can significantly impact your menstrual cycle. The trauma from a car accident, even if you did not sustain severe injuries, can lead to emotional and physical stress, which may disrupt your hormonal balance. Stress affects the hypothalamus, the part of the brain that regulates hormones related to the menstrual cycle. This disruption can lead to delayed ovulation or even skipped periods.

Secondly, the medications you were prescribed, such as anti-inflammatory and pain relief medications, can also influence your menstrual cycle. Some medications can affect hormone levels or the way your body processes hormones, potentially leading to changes in your cycle. It’s crucial to check with your healthcare provider about the specific medications you were prescribed and their potential side effects on your menstrual cycle.

Additionally, the occurrence of sexual intercourse around the time of your missed period raises the possibility of pregnancy. If there was any chance of unprotected intercourse, it would be wise to take a home pregnancy test. These tests are generally reliable and can provide quick results. If the test is positive, it’s essential to follow up with your healthcare provider for further evaluation and guidance.

Other potential causes for a delayed period could include changes in weight, excessive exercise, or underlying health conditions such as polycystic ovary syndrome (PCOS) or thyroid disorders. If you have experienced significant weight loss or gain, or if you have been engaging in intense physical activity, these factors could also contribute to a delayed cycle.

If your period does not start soon, or if you experience other concerning symptoms such as severe pain, unusual discharge, or if you suspect pregnancy, it is advisable to consult with your healthcare provider. They may recommend further testing, such as blood tests or ultrasounds, to determine the underlying cause of your delayed menstruation.

In summary, a nine-day delay in your menstrual cycle can be attributed to various factors, including stress from your recent car accident, the medications you took, potential pregnancy, or other health-related issues. It’s essential to monitor your symptoms and consult with a healthcare professional for personalized advice and treatment options.

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