Missed Period After Taking Emergency Contraceptive: What to Do? - Obstetrics and Gynecology

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If you took emergency contraception and your period is late,


Hello Doctor, I took emergency contraception on July 15 and combined it with two doses of a yellow contraceptive pill (morning and evening for five days).
My period came on time on July 22 as scheduled.
However, my period for the following month in August was eight days late and still hasn't arrived by August 31.
Additionally, I had a small amount of red discharge at the beginning of August.
Could you please advise what the issue might be and how I should proceed? Thank you.

Niming, 20~29 year old female. Ask Date: 2017/08/31

Dr. Huang Jianzhong reply Obstetrics and Gynecology


On July 15, after taking emergency contraception, I took two tablets of Diazepam along with the orange birth control pills (morning and evening for five days).
My period came on time on July 22 as scheduled.
However, my period for the following month in August was eight days late, and as of August 31, it still hasn't arrived.
Additionally, I had a slight discharge of red fluid at the beginning of August.
Could you please advise what the issue might be and how to proceed? Answer: First, take a pregnancy test.

Reply Date: 2017/08/31

More Info


When it comes to missed periods after taking emergency contraceptive pills (ECPs), there are several factors to consider. Firstly, it's important to understand how ECPs work. They are designed to prevent pregnancy after unprotected intercourse, primarily by delaying ovulation. However, they can also cause temporary changes in your menstrual cycle.
In your case, you took emergency contraception on July 15, and your period came on time on July 22. This indicates that the ECP was effective in preventing pregnancy from the earlier unprotected intercourse. However, the missed period in August, which is now eight days late, can be concerning.
There are a few potential reasons for a missed period after taking emergency contraception:
1. Hormonal Fluctuations: ECPs can cause hormonal changes that may lead to irregularities in your menstrual cycle. This can result in a delayed period, especially if you have taken other hormonal medications, such as the orange birth control pills mentioned.

2. Pregnancy: Although ECPs are effective, they are not 100% guaranteed. If you had unprotected intercourse after taking the ECP or if the timing of ovulation was affected, there is still a possibility of pregnancy.
3. Stress and Lifestyle Factors: Stress, changes in weight, illness, or changes in routine can also affect your menstrual cycle.
4. Underlying Health Issues: Conditions such as polycystic ovary syndrome (PCOS), thyroid disorders, or other hormonal imbalances can lead to missed periods.

Given that you experienced some red discharge at the beginning of August, this could be a sign of hormonal changes or possibly implantation bleeding if pregnancy occurred. However, it is essential to note that not all red discharge indicates pregnancy; it could also be a sign of an irregular cycle.


What Should You Do?
1. Take a Pregnancy Test: The first step is to take a home pregnancy test. These tests are most accurate when taken after a missed period. If the test is positive, you should schedule an appointment with your healthcare provider to discuss your options.

2. Monitor Your Symptoms: Keep track of any other symptoms you may experience, such as breast tenderness, nausea, or changes in appetite, which can provide additional clues about your hormonal status.

3. Consult Your Healthcare Provider: Regardless of the pregnancy test result, if your period does not arrive soon, or if you have concerns about your menstrual cycle or any other symptoms, it is advisable to consult with a healthcare provider. They can perform a more thorough evaluation, including blood tests, to check hormone levels and rule out any underlying conditions.

4. Consider Your Birth Control Options: If you are not planning to become pregnant, discuss long-term birth control options with your healthcare provider. This can help you avoid the need for emergency contraception in the future and provide more consistent cycle regulation.

In summary, while missed periods after taking emergency contraception can be common due to hormonal fluctuations, it is essential to rule out pregnancy and consult with a healthcare provider if your period does not return or if you have any other concerns. Taking proactive steps will help you manage your reproductive health effectively.

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