Menstrual Delays After Unprotected Intercourse: What to Do Next - Obstetrics and Gynecology

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Menstrual issues


Hello Doctor: I would like to seek your help regarding the anxiety my girlfriend and I are experiencing.
We had sexual intercourse on the 3rd of this month.
Due to impulsiveness, we did not use a condom.
The intercourse lasted about five minutes, and I did not ejaculate.
It may have been my girlfriend's first time, and I did not fully penetrate; it was only about halfway.
Approximately 48 hours later, she took emergency contraception, but as of today, her period has not yet arrived.
Her menstrual cycle is usually quite regular, occurring around the 5th to 7th of each month.
We are very anxious and fearful of an unintended pregnancy, as my girlfriend is too scared to take a pregnancy test or visit a gynecologist.
I am unsure how to address this situation.
Doctor, what is the likelihood of conception under these circumstances? If her period does not arrive, when should we consider taking the next steps? Thank you, Doctor.

HSW, 20~29 year old female. Ask Date: 2014/07/08

Dr. Yang Wangjun reply Obstetrics and Gynecology


Hello: (1) You had sexual intercourse on July 3rd, and it has not yet been a week, so it may be too early to test for pregnancy.
It is recommended to wait another week before taking a pregnancy test.
Your girlfriend's menstrual cycle this month is irregular, which may indicate that she did not ovulate, but it is also possible that ovulation was delayed and occurred recently, so there is still a chance of conception.
(2) Usually, a medical abortion using RU486 can be performed within the first seven weeks of pregnancy.
Surgical abortion can be performed before twelve weeks.
After twelve weeks, the process becomes more complicated.
Therefore, it is essential to take a pregnancy test early to take advantage of this critical time.
Thank you for your message!

Reply Date: 2014/07/08

More Info


It's understandable that you and your girlfriend are feeling anxious about the possibility of pregnancy after having unprotected intercourse, even if it was brief and without ejaculation. Let's break down the situation and discuss what steps you can take next.

Firstly, it's important to understand that the likelihood of pregnancy occurring from the scenario you described is relatively low, but not impossible. Sperm can be present in pre-ejaculatory fluid, and if any sperm were introduced into the vagina, there is a chance of fertilization. However, since you mentioned that you did not fully penetrate and did not ejaculate, the risk is significantly reduced.

Your girlfriend took emergency contraception (the morning-after pill) within 48 hours, which is a proactive step. Emergency contraception is most effective when taken as soon as possible after unprotected intercourse, and it can reduce the risk of pregnancy by up to 89% if taken within 72 hours. However, it is not 100% effective, and its efficacy can be influenced by factors such as the timing of the menstrual cycle and the specific type of emergency contraceptive used.

Now, regarding the delay in her menstrual cycle: it is common for menstrual cycles to be affected by various factors, including stress, hormonal fluctuations, and the use of emergency contraception. The hormonal changes induced by the morning-after pill can lead to a delay in menstruation, and it may take some time for her cycle to regulate itself. It's not unusual for periods to be delayed by a week or more after taking emergency contraception.

Given that her menstrual cycle is typically regular, it would be advisable for her to wait a few more days to see if her period arrives. If her period does not come within a week of its expected date, it would be prudent for her to take a home pregnancy test. These tests are widely available, easy to use, and can provide results within minutes. If the test is positive, she should seek medical advice from a healthcare provider to discuss her options.

If she is feeling particularly anxious about the situation, encourage her to visit a healthcare provider, even if it’s just for reassurance. A healthcare professional can provide guidance, perform a pregnancy test, and discuss any concerns she may have about her reproductive health. It’s important to address these feelings of anxiety, as they can affect both of your well-being.

In summary, while the risk of pregnancy in your situation is low, it is not zero. The delay in her menstrual cycle could be a result of the emergency contraception or other factors. Waiting a few more days and then taking a pregnancy test would be the next logical step. If there are any further concerns or if she continues to feel anxious, seeking medical advice is always a good option. Communication and support between you and your girlfriend during this time are essential.

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