Delayed Menstruation After Taking Menstrual Regulation Pills: Is Pregnancy Possible?

Delayed menstruation after regulating the menstrual cycle?

Hello doctor, due to irregular menstrual cycles, I started taking the medication Xin Na to regulate my period this month.
I finished the last pill on August 29, but I haven't gotten my period yet as of August 30.
I understand that it's not guaranteed to get my period the day after finishing the medication.
However, I had unprotected sexual intercourse with my boyfriend on August 18, but he withdrew before ejaculation.
I would like to ask if there is a possibility of pregnancy.

Alice, 20~29 year old female. Ask Date: 2018/08/31

Dr. Huang Jianzhong reply Obstetrics and Gynecology

Due to irregular menstrual cycles, I started taking the medication Xinna to regulate my period this month.
I just finished the last pill on August 29, but I haven't gotten my period yet as of August 30.
I understand that it's not guaranteed to get my period the day after finishing the medication, but I had unprotected intercourse with my boyfriend on August 18, where he withdrew before ejaculation.
I would like to ask the doctor if there is a possibility of pregnancy.
Answer: There is no possibility of pregnancy.

Reply Date: 2018/08/31

More Info

When it comes to the possibility of pregnancy after taking menstrual regulation pills, it's important to understand how these medications work and the timing of your menstrual cycle. Menstrual regulation pills, such as those containing hormones, are designed to help regulate irregular menstrual cycles. However, they do not guarantee that menstruation will occur immediately after finishing the course of medication.

In your case, since you finished taking the pills on August 29 and have not yet experienced your period, it is possible that your body is still adjusting to the hormonal changes induced by the medication. It is not uncommon for menstruation to be delayed for a few days or even longer after completing a course of menstrual regulation pills. The timing of your menstrual cycle can be influenced by various factors, including stress, changes in weight, and hormonal fluctuations.

Regarding the sexual encounter on August 18, where you mentioned that you engaged in unprotected intercourse but used the withdrawal method (pulling out), there is still a possibility of pregnancy. The withdrawal method is not a reliable form of contraception, as pre-ejaculate fluid can contain sperm, and if any sperm were to enter the vagina, it could lead to fertilization.

Given that you are experiencing a delay in your period and have had unprotected intercourse, it would be advisable to take a home pregnancy test. These tests are generally accurate and can provide you with a clear answer regarding the possibility of pregnancy. If the test is positive, it is important to schedule an appointment with your healthcare provider to discuss your options and next steps.

If the test is negative and your period still does not arrive, it may be worth consulting with your healthcare provider to rule out any underlying issues or to discuss the possibility of needing further hormonal regulation or evaluation of your menstrual cycle.

In summary, while there is a possibility of pregnancy due to the unprotected intercourse, the delay in your menstruation could also be a result of the hormonal changes from the menstrual regulation pills. Taking a pregnancy test will provide clarity, and if you have any concerns or questions, reaching out to your healthcare provider is always a good step to ensure your reproductive health is managed appropriately.

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