Birth Control Pills for PCOS: Delayed Period Concerns - Obstetrics and Gynecology

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Questions about taking birth control pills for polycystic ovary syndrome (PCOS)?


My last menstrual period was on October 8.
Due to polycystic ovary syndrome, I visited a gynecologist on November 14 for related examinations, and the doctor prescribed a three-day course of medication to induce menstruation.
On November 21, during a follow-up appointment to review my blood test results, the doctor prescribed Diane-35 birth control pills to help regulate my menstrual cycle and adjust my androgen levels, which I started taking that day.
In the past, my period would typically start about five days after taking the medication to induce menstruation, but now it has been nine days, and as of November 26, my period still hasn't arrived.
Is this delay due to the birth control pills? Should I stop taking the pills to allow my period to come, or should I continue taking them for the full 21 days? Thank you, doctor, for taking the time to respond.

Catherine, 30~39 year old female. Ask Date: 2018/11/26

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, if you are already taking birth control pills, your menstrual period may not occur.
If you have any concerns, you can consult your regular obstetrician-gynecologist.
Wishing you good health.

Reply Date: 2018/11/26

More Info


When it comes to understanding the use of birth control pills, particularly for women with Polycystic Ovary Syndrome (PCOS), it is essential to consider how these medications interact with the body and the specific concerns you have regarding delayed periods.

Firstly, it is important to note that birth control pills, such as the one you mentioned (Diane-35), are often prescribed to help regulate menstrual cycles in women with PCOS. These pills work primarily by providing a steady dose of hormones (estrogen and progestin) that can help to stabilize the hormonal fluctuations that are common in PCOS. This stabilization can lead to more regular menstrual cycles, reduced androgen levels, and improved symptoms associated with PCOS, such as acne and excessive hair growth.

In your case, you started taking the birth control pills on November 21 after a course of medication to induce your period. It is not uncommon for women to experience some delay in their menstrual cycle when they first start taking birth control pills. This delay can occur for several reasons:
1. Hormonal Adjustment: Your body may take some time to adjust to the new hormone levels introduced by the birth control pills. This adjustment period can lead to changes in your menstrual cycle, including delays.

2. Previous Medications: Since you were on medication to induce your period prior to starting the birth control pills, your body may still be responding to those hormonal changes. The transition from one hormonal state to another can sometimes cause irregularities.

3. PCOS Effects: PCOS itself can lead to irregular menstrual cycles. Even when on birth control pills, some women may experience delays or changes in their cycle due to the underlying condition.

Given that you have not had a period nine days after starting the birth control pills, it is essential to consider the following:
- Continue Taking the Pills: It is generally recommended to continue taking the birth control pills as prescribed for the full 21 days. Stopping the pills prematurely can lead to further hormonal imbalances and may not resolve the issue of a delayed period.

- Monitor for Other Symptoms: If you experience any unusual symptoms such as severe abdominal pain, heavy bleeding, or signs of pregnancy (such as nausea or breast tenderness), it is crucial to consult your healthcare provider.

- Follow-Up Appointment: Since you have a follow-up appointment with your gynecologist, it would be a good idea to discuss your concerns about the delayed period during that visit. Your doctor can provide personalized advice based on your medical history and current situation.

In summary, while it is concerning to experience a delayed period after starting birth control pills, it is not uncommon, especially for women with PCOS. Continuing the medication as prescribed and discussing your concerns with your healthcare provider will help ensure that you receive the appropriate care and guidance tailored to your needs. Remember, managing PCOS often requires a comprehensive approach, including lifestyle changes, medication, and regular monitoring by a healthcare professional.

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