Why Your Period Might Be Delayed After Two Hormonal Injections - Obstetrics and Gynecology

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I received two injections to induce menstruation, but my period still hasn't started?


My last menstrual period was on August 31, and I still haven't gotten it by October 10.
I had sexual intercourse with my boyfriend on September 5, 11, 29, and October 1.
We only started using condoms in between, and there were a few times when we didn't ejaculate but engaged in foreplay, so we didn't use protection.
On October 8, I visited the doctor and took a pregnancy test, which showed one line (I tested twice).
I received an injection to induce menstruation, but my period still hasn't come.
The doctor said if it doesn't come in two days, I need to return for a follow-up, so I received another injection to induce menstruation.
I feel significant discomfort in my lower back, but my period still hasn't arrived.
Could this be related to pregnancy?

Tang, 20~29 year old female. Ask Date: 2016/10/10

Dr. Huang Yiwen reply Obstetrics and Gynecology


Hello, Miss Tang: If your period is delayed and a urine test confirms that you are not pregnant, after receiving an injection to induce menstruation, you generally need to wait a week.
If your period still does not arrive, you can take another urine test.
If the urine test shows no pregnancy, there is no need to worry.
You can receive another injection to induce menstruation or consider using oral medication to induce your period.

Reply Date: 2016/10/10

More Info


Delayed menstruation can be a source of concern for many women, especially when they have recently engaged in sexual activity or received hormonal injections. In your case, there are several factors to consider that could explain why your period has not arrived despite receiving hormonal injections and negative pregnancy tests.

Firstly, it is important to understand that hormonal injections, such as those used to induce menstruation, can have varying effects on the menstrual cycle. These injections typically contain hormones that help regulate the menstrual cycle, but they can also cause temporary disruptions. The body may take some time to adjust to the hormonal changes, which can lead to delays in menstruation.
In your situation, you mentioned that you received two hormonal injections to induce your period. While these injections are designed to help trigger menstruation, they do not guarantee immediate results. It is not uncommon for women to experience a delay even after receiving such injections. The body may respond differently to the hormones, and factors such as stress, changes in weight, or underlying health conditions can also play a role in menstrual irregularities.

Additionally, your sexual activity during September and early October raises questions about the possibility of pregnancy. Although you have taken two pregnancy tests that returned negative results, it is important to note that testing too early can sometimes yield false negatives. If you had unprotected intercourse, even if there was no ejaculation, there is still a risk of pregnancy due to pre-ejaculate fluid, which can contain sperm. If your period does not arrive soon, it may be advisable to consult your healthcare provider for further evaluation, including a blood test for pregnancy, which is more sensitive than home urine tests.

Moreover, the timing of your menstrual cycle is crucial. You mentioned that your last period started on August 31, and you have been experiencing a delay since then. If your cycles are typically regular, a delay of over a month can be concerning. Hormonal imbalances, stress, and lifestyle changes can all contribute to such delays.
In summary, the delay in your period after receiving hormonal injections could be attributed to the body's response to the hormones, potential pregnancy, or other underlying factors. It is essential to follow up with your healthcare provider, especially since you have received two injections and are still experiencing a delay. They may recommend further testing or monitoring to determine the cause of your missed period and to ensure that there are no underlying health issues that need to be addressed. Remember, maintaining open communication with your healthcare provider is key to understanding your reproductive health and addressing any concerns you may have.

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