Can Menstrual Induction Injections Prevent Pregnancy After Intercourse?

Menstrual induction injection contraception

On June 24, after having intercourse with my boyfriend, I noticed a white discharge from my vagina that smelled similar to semen.
However, the condom did not break, but I am unsure if it slipped off.
The next morning, I immediately went to the gynecology department to receive a menstrual induction injection.
My last menstrual period was on June 6.
Can the menstrual induction injection prevent pregnancy? What is the likelihood of becoming pregnant in this situation? Should I take emergency contraception? Thank you, doctor.
🙏

Mo Mo, 20~29 year old female. Ask Date: 2021/06/25

Dr. Wu Xianghui reply Obstetrics and Gynecology

1.
For pregnancy concerns, please take a home pregnancy test or visit a gynecologist for examination and evaluation four weeks after your most recent sexual intercourse.

2.
The menstrual cycle can be influenced by various psychological and physiological factors.
If your period is more than two months late, it is recommended to consult a gynecologist for examination and evaluation.

Reply Date: 2021/06/25

More Info

Menstrual induction injections, often referred to as menstrual regulation injections, are primarily used to manage menstrual cycles and are not designed as a form of contraception. If you had unprotected intercourse and are concerned about the possibility of pregnancy, it is essential to understand how these injections work and their effectiveness in preventing pregnancy.

Firstly, menstrual induction injections typically contain hormones that can help regulate or induce menstruation. They may contain medications such as progestins or estrogen, which can influence the menstrual cycle. However, these injections are not intended to prevent ovulation or fertilization, which are the primary mechanisms of contraceptive methods. Therefore, if you had unprotected intercourse, the likelihood of becoming pregnant remains, even after receiving a menstrual induction injection.

In your case, since you had intercourse on June 24 and received the injection the following day, it is crucial to consider the timing of ovulation. If ovulation occurred shortly before or around the time of intercourse, there is a possibility that sperm could fertilize an egg, leading to pregnancy. The presence of white discharge that resembles semen could be a normal physiological response, but it does not necessarily indicate whether fertilization has occurred.

Given that your last menstrual period started on June 6, it is possible that you were approaching ovulation around June 24, depending on your individual cycle length. If your cycle is typically around 28 days, ovulation may have occurred around June 20 to June 24, which would further increase the risk of pregnancy if sperm were present during that time.

If you are concerned about the risk of pregnancy, it is advisable to consider emergency contraception options, such as the morning-after pill (levonorgestrel or ulipristal acetate), which can be effective if taken within a certain timeframe after unprotected intercourse. These medications work by delaying ovulation or preventing fertilization, thus reducing the risk of pregnancy.

In summary, menstrual induction injections are not a reliable method of contraception and do not prevent pregnancy after unprotected intercourse. If you are worried about the possibility of being pregnant, it is best to consult with a healthcare provider for further evaluation and to discuss emergency contraception options. Additionally, if you experience any unusual symptoms or changes in your menstrual cycle following the injection, it is essential to follow up with your healthcare provider for appropriate guidance and care.

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