Can Stopping Birth Control Pills Lead to Pregnancy Risks? - Obstetrics and Gynecology

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Stop taking birth control pills?


I have been taking birth control pills for about six months and recently stopped.
My last menstrual period was from July 25 to July 30.
However, I had unprotected intercourse with my boyfriend on March 8.
Is there a chance I could become pregnant? Will I resume ovulation within a week after stopping the pills? Please help me with this.
Thank you.

Ms. Chen, 20~29 year old female. Ask Date: 2018/08/04

Dr. Huang Jianzhong reply Obstetrics and Gynecology


I have been taking birth control pills for about six months and recently stopped.
My last menstrual period was from July 25 to July 30.
However, I had unprotected intercourse with my boyfriend on August 3.
Is there a chance I could become pregnant?
Answer: Since my last menstrual period was from July 25 to July 30, and I had unprotected intercourse on August 3, there is a possibility of becoming pregnant.
Will ovulation resume within a week after stopping the pills?
Answer: Ovulation can resume anywhere from two weeks to two years after discontinuing the pills.

Reply Date: 2018/08/04

More Info


When it comes to stopping birth control pills and the potential risks of pregnancy, there are several important factors to consider. Birth control pills, particularly combined oral contraceptives, work by regulating hormones to prevent ovulation, thicken cervical mucus, and thin the uterine lining. When you stop taking these pills, your body may take some time to readjust to its natural hormonal cycle, which can impact ovulation and fertility.

In your case, you mentioned that you stopped taking the birth control pills after about six months of use and had your last menstrual period from July 25 to July 30. You then had unprotected intercourse on March 8. It’s important to note that after discontinuing birth control pills, many women may experience a return to their natural menstrual cycle relatively quickly, but this can vary from person to person. Some women may ovulate within a week of stopping the pill, while others may take a few cycles to return to regular ovulation.

Given that you had unprotected intercourse shortly after stopping the pill, there is indeed a possibility of pregnancy. If you ovulated shortly after stopping the pill, sperm can survive in the female reproductive tract for up to five days, which means that if you ovulated within that timeframe, conception could occur.
To assess your risk of pregnancy, consider the following:
1. Timing of Ovulation: If you stopped taking the pill and had unprotected sex within a week, you could potentially be at risk for pregnancy, depending on when you ovulated. Ovulation typically occurs about 14 days before your next expected period, but this can vary.

2. Cycle Regularity: If your menstrual cycles were regular before starting the pill, you might have a better idea of when to expect ovulation. However, if your cycles were irregular, it may be more challenging to predict ovulation.

3. Signs of Ovulation: Some women experience physical signs of ovulation, such as changes in cervical mucus (becoming clearer and more stretchy), mild cramping, or breast tenderness. Monitoring these signs can help you understand your cycle better.

4. Pregnancy Testing: If your period is late or you experience symptoms of pregnancy (such as nausea, breast tenderness, or fatigue), consider taking a home pregnancy test. These tests are generally accurate if taken after a missed period.

5. Consulting a Healthcare Provider: If you have concerns about your menstrual cycle, potential pregnancy, or any other reproductive health issues, it’s advisable to consult with a healthcare provider. They can provide personalized advice based on your medical history and current situation.

In conclusion, stopping birth control pills can lead to a risk of pregnancy, especially if unprotected intercourse occurs shortly after discontinuation. It’s essential to be aware of your body’s signals and consider using alternative contraception methods if you wish to avoid pregnancy. If you have any doubts or concerns, reaching out to a healthcare professional is always a good step to ensure your reproductive health is managed effectively.

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Dr. Zhang Kunmin reply Obstetrics and Gynecology
Hello, based on your description, there is a possibility of pregnancy. It is recommended that if your period is more than a week late, you should take a urine test to check for pregnancy. Thank you! Wishing you peace and health. Dr. Chang

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