Should You Get Menstrual Induction Shots or Take RU486? - Obstetrics and Gynecology

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Should I get an injection to induce menstruation or take RU486?


Hello, doctor: I'm really worried because my period hasn't come as scheduled.
I'm afraid of the possibility of being pregnant.
I would like to ask if getting a menstrual induction injection can help me get my period.
I want to take medication to avoid an unwanted pregnancy, but there are no such medications available at my doctor's office, so I have to go to a clinic to get the medication.
If I conceive naturally, will taking the medication be harmful to my body? How long should I rest? Also, do you have consultations at the Shetou Health Center? I would like to take my child for a flu vaccine.
Thank you.

huanzhe, 30~39 year old female. Ask Date: 2012/10/03

Dr. Lin Wenbin reply Obstetrics and Gynecology


Hello, if you are concerned about not having your period due to pregnancy, it is advisable to practice effective contraception.
Menstrual induction injections are ineffective if you are already pregnant.
Once pregnant, receiving menstrual induction injections will not result in a menstrual period.
If early pregnancy (before seven weeks) is confirmed by a physician and the gestational sac is located within the uterus (not an ectopic pregnancy), and you do not wish to continue the pregnancy, you may take RU486 for abortion.
However, it is crucial to first have a physician confirm that it is an intrauterine pregnancy before taking the medication.
Otherwise, if it is an ectopic pregnancy, it could lead to severe bleeding and even life-threatening shock.
Both the use of abortion medication and surgical abortion carry certain risks, such as heavy bleeding and infection, which are serious complications.
Therefore, abortion should not be considered a method of post-coital contraception.
This point is very important.
You can directly consult with Director Tseng in Shetou.
Currently, due to job reassignment, he is temporarily unavailable for consultations in Shetou.

Reply Date: 2012/10/03

More Info


When considering whether to use menstrual induction shots or RU486 (Mifepristone), it's essential to understand the purpose and implications of each option. Menstrual induction shots, often containing hormones like progesterone or estrogen, are typically used to regulate menstrual cycles and can help trigger a period if one is delayed. On the other hand, RU486 is primarily used for medical abortion, allowing women to terminate an early pregnancy, usually within the first seven weeks.

If you suspect you might be pregnant due to a missed period, it is crucial to confirm your pregnancy status before considering any medication. A home pregnancy test or a visit to a healthcare provider can provide clarity. If you are indeed pregnant, RU486 is an option, but it should only be taken under the supervision of a qualified healthcare provider. The process involves taking Mifepristone followed by another medication, usually Misoprostol, to complete the abortion process. The success rate for this method is approximately 95% when used within the first seven weeks of pregnancy.

Regarding the concern about taking medications while potentially pregnant, it is essential to avoid self-medicating without professional guidance. Taking RU486 without confirming pregnancy or without medical supervision can lead to complications and is not advisable. If you are looking to avoid an unintended pregnancy, it is best to consult with a healthcare provider about your options, which may include emergency contraception if you are within the appropriate time frame after unprotected intercourse.

In terms of health impacts, using RU486 when not pregnant can lead to unnecessary side effects, including heavy bleeding, cramping, nausea, and other gastrointestinal symptoms. If you are not pregnant and take RU486, it could cause significant health issues, including potential complications from excessive bleeding or infection.

As for the question about flu vaccinations for children, it is advisable to consult with a healthcare provider or pediatrician regarding vaccination schedules and recommendations. Vaccinations are crucial for preventing illnesses, and healthcare providers can offer guidance based on the child's health history and current health status.

In summary, if you are experiencing a missed period and are concerned about pregnancy, the best course of action is to confirm your pregnancy status with a healthcare provider. If you are pregnant and considering RU486, it is vital to do so under medical supervision. If you are not pregnant and are looking to induce menstruation, menstrual induction shots may be an option, but again, this should be discussed with a healthcare provider to ensure it is safe and appropriate for your situation. Always prioritize your health and well-being by seeking professional medical advice.

Similar Q&A

Can You Use Menstrual Induction Shots During Early Pregnancy?

Hello Doctor: I am 6 weeks pregnant. Is it possible to receive a menstrual induction injection? Or should I consider a medical abortion? At 6 weeks, is it better to take medication or undergo a surgical procedure? I would appreciate your guidance. Thank you.


Dr. Li Guanghan reply Obstetrics and Gynecology
Hello: At six weeks of pregnancy, it is no longer possible to use medication to induce menstruation. Generally, after six and a half weeks, RU486 is also not applicable. Both methods have their advantages and disadvantages, so you should discuss with your physician which method o...

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Understanding Menstrual Induction Shots: Risks, Timing, and Considerations

Hello, doctor: Is it harmful to the body to receive a menstrual induction injection? How long before the expected date should it be administered, and when can I expect my period to start? What precautions and care should I take? I've heard that some people experience side ef...


Dr. Li Guanghan reply Obstetrics and Gynecology
Generally, delaying menstruation should begin one week before the expected period, which can lead to more significant side effects and complications. Ovulation induction injections must be administered during the luteal phase after ovulation, using a high dose of progesterone (in...

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Understanding Heavy Menstrual Flow: Why Was I Given a Menstrual Induction Shot?

Hello Doctor: I have been experiencing continuous menstrual bleeding, so I went to see a gynecologist. At that time, I was still on my period, and the doctor administered a medication to induce menstruation. I would like to ask why the doctor would give me this medication while I...


Dr. Lü Lizheng reply Obstetrics and Gynecology
The injection in question is likely progesterone. For patients who have missed their menstrual period, administering progesterone can induce menstruation. In patients with menstrual irregularities, progesterone can help stabilize the menstrual cycle. If the effects of progesteron...

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When to Take Emergency Contraceptive After RU486 Use?

Hello doctor, I took Ru486 on January 26 and a uterine contraction medication on January 28. I just got my period yesterday, on March 8. Should I wait until the first day of my next period to take it, or should I wait until this period ends?


Dr. Cao Guotao reply Obstetrics and Gynecology
Hello, you need to wait for your next menstrual period to indicate that this event is completely over. Generally, you should take it on the fifth day of your period. Wishing you good health.

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