Menstrual Regulation Pills and Safe Periods - Obstetrics and Gynecology

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Menstrual regulation medications and the safe period?


Hello, doctor.
I would like to ask about my menstrual regulation medication.
I have been taking it for quite a while.
I am on two types of medications: one is CLOMIPHENE CAPSULES "YU" (active ingredient: CLOMIPHENE CITRATE 50MG) which I take starting on the third day of my menstrual cycle, and then I take SHITON S.C.
TABLETS "YU SHEN" (active ingredient: NORETHINDRONE 5MG) after ovulation.

Q1: I started taking the medication on August 19, and I had unprotected intercourse on that same day.
However, I usually take my medication before bed.
Do I still need to take emergency contraception?
Q2: If I need to take emergency contraception, is it still effective if I take it now? I have already started taking the second type of medication.
Q3: I would also like to ask if I am in a safe period after starting this medication.

Niming, 10~19 year old female. Ask Date: 2018/08/21

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, you started taking the medication on August 19, which is theoretically safe.
However, you mentioned that you have already started taking a second type of menstrual regulation medication.
Isn't the second type supposed to be taken after the ovulation period? There seems to be some confusion with the timing.
Taking emergency contraception now may be too late.
It's always best to use preventive measures beforehand and not rely on the safe period.
If your period is delayed for more than a week, I recommend seeing a gynecologist.
Wishing you good health.

Reply Date: 2018/08/21

More Info


When it comes to understanding menstrual regulation pills and safe periods, it’s essential to consider the specific medications you are taking and how they interact with your menstrual cycle. You mentioned using Clomiphene Citrate and Norethindrone, which are commonly prescribed for regulating menstrual cycles and managing ovulation.

Q1: Do I need to take emergency contraception after unprotected intercourse on the same day I started taking Clomiphene?
Clomiphene Citrate is typically taken during the early part of the menstrual cycle to stimulate ovulation. If you had unprotected intercourse on the same day you started taking Clomiphene, it is crucial to understand that Clomiphene does not provide immediate contraception. The timing of ovulation can vary, but Clomiphene is intended to induce ovulation, which means there is a possibility of becoming pregnant if you have unprotected sex around that time.
If you are concerned about the possibility of pregnancy, it is advisable to consider taking emergency contraception (EC) as soon as possible. Emergency contraception is most effective when taken within 72 hours after unprotected intercourse, but some forms can be effective up to 5 days later. Since you have already started taking Norethindrone, which is a progestin, it may alter the effectiveness of some emergency contraceptive methods, particularly those that rely on estrogen. Therefore, it is best to consult with a healthcare provider immediately to discuss your options.

Q2: If I need to take emergency contraception, is it too late now that I have started the second medication?
If you are considering emergency contraception, it is generally recommended to take it as soon as possible after unprotected intercourse. While starting Norethindrone may complicate the situation slightly, it is still advisable to consult with a healthcare provider. They can provide guidance on the best course of action based on your specific situation and the timing of your medications.
Q3: Once I start taking Norethindrone, am I in a safe period?
Norethindrone is a synthetic progestin that can help regulate the menstrual cycle and prevent ovulation. However, it does not guarantee that you are in a "safe period" for unprotected intercourse. The concept of a "safe period" typically refers to the days in your cycle when you are least likely to conceive, which can vary significantly from person to person.
Since you are taking Norethindrone, it is likely that your body will be less likely to ovulate, but it is not foolproof. The effectiveness of Norethindrone in preventing ovulation depends on consistent and correct usage. If you have just started taking it, it may take some time for your body to adjust, and it is not advisable to rely solely on it for contraception during the initial days of use.

In conclusion, it is crucial to communicate with your healthcare provider regarding your concerns about unprotected intercourse, the need for emergency contraception, and the implications of starting your menstrual regulation medications. They can provide personalized advice based on your health history and current medications. Always remember that while hormonal contraceptives can be effective, they are not 100% guaranteed, and understanding your cycle and medication interactions is key to effective family planning.

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