Am I Pregnant? Late Periods and Emergency Contraceptives - Obstetrics and Gynecology

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Are you pregnant?


After taking the emergency contraceptive pill, my period was very late.
I went to the gynecologist for an ultrasound, and the doctor said there was nothing abnormal.
Later, I was prescribed medication to induce my period, and after taking it, my period came.
Does this mean I was pregnant?

xx, 10~19 year old female. Ask Date: 2016/01/08

Dr. Tian Yiwen reply Obstetrics and Gynecology


The chances of pregnancy are low, but if you are concerned, it is recommended to purchase a home pregnancy test.

Reply Date: 2016/01/08

More Info


When it comes to the question of whether you might be pregnant, especially after taking emergency contraception and experiencing a late period, it's essential to understand the various factors at play. Based on your description, it seems that you took emergency contraception after unprotected intercourse, which is designed to prevent pregnancy. However, it is not 100% effective, and the timing of your menstrual cycle can also influence the outcome.

Emergency contraceptive pills (ECPs) work primarily by delaying ovulation. If you take them before ovulation, they can effectively prevent the egg from being fertilized. However, if ovulation has already occurred, the effectiveness of ECPs diminishes. After taking the ECP, it is common for your menstrual cycle to be disrupted. This can result in a delayed period, which can understandably cause anxiety about the possibility of pregnancy.

In your case, you mentioned that you visited a gynecologist who performed an ultrasound and found no signs of pregnancy. This is a significant indicator that you are likely not pregnant, especially if the ultrasound was conducted after the expected date of your period. Additionally, the doctor prescribed medication to induce your period, which suggests that your body was simply experiencing a delay rather than a pregnancy.

It is also important to note that menstrual cycles can vary significantly from month to month due to various factors, including stress, hormonal imbalances, and lifestyle changes. If you have a history of irregular cycles, this could also explain the delay in your period.

If your period returned after taking the medication, it further supports the idea that you were not pregnant. Menstrual bleeding after taking medication to induce a period typically indicates that the body is shedding the uterine lining, which is a normal part of the menstrual cycle.

In conclusion, based on the information provided, it seems unlikely that you are pregnant. However, if you continue to experience irregularities in your menstrual cycle or have concerns about your reproductive health, it would be wise to follow up with your healthcare provider. They can offer further evaluations, such as hormone level testing or additional ultrasounds, to ensure everything is functioning as it should.

In summary, while the anxiety surrounding a late period and the potential for pregnancy is understandable, the combination of taking emergency contraception, the results of your ultrasound, and the subsequent return of your menstrual cycle suggest that you are not pregnant. If you have any lingering concerns or if your cycles continue to be irregular, seeking further medical advice is always a good step.

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