Pregnancy Risk After Missing Birth Control Pills - Obstetrics and Gynecology

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Eighth day after stopping the oral contraceptive pill?


Since starting medication in early June and finishing the course on August 3, 2023, there was a seven-day gap before the next pack was supposed to begin on August 31.
However, due to feeling unwell, the medication was not resumed immediately.
On August 31, unprotected sexual intercourse occurred, and it is uncertain whether ejaculation inside took place.
The next pack of medication was started on September 4, and there has been no sexual activity since August 31.
Recently, there has been some nipple tenderness (which sometimes occurs before menstruation), but there has been no breast engorgement, increased discharge, or bleeding.
What is the likelihood of pregnancy?

Chen, 20~29 year old female. Ask Date: 2018/09/12

Dr. Huang Jianzhong reply Obstetrics and Gynecology


Since starting medication in early June, I finished the medication on August 3, 2023, and took a seven-day break.
I was supposed to start the next pack on August 31, but due to feeling unwell, I did not resume immediately.
However, I had unprotected intercourse on August 31 (I forgot if there was ejaculation).
I began the next pack of medication on September 4, and there has been no sexual activity since August 31.
Recently, I have experienced some nipple tenderness (which sometimes occurs before my menstrual period), but there has been no breast engorgement, increased discharge, or bleeding.
What is the likelihood of pregnancy? Answer: The likelihood of pregnancy is low.

Reply Date: 2018/09/12

More Info


When it comes to understanding the risks associated with missing birth control pills, it's essential to consider how hormonal contraceptives work and the implications of inconsistent use. Birth control pills contain hormones that prevent ovulation, thicken cervical mucus, and thin the uterine lining, making it difficult for sperm to fertilize an egg and for a fertilized egg to implant. When pills are missed, especially during the first week of a new pack, the risk of pregnancy increases significantly.

In your case, you mentioned that you started taking the pills in early June and continued until August 3rd, after which you took a break for seven days. You were supposed to start the next pack on August 31st but delayed it due to feeling unwell. Engaging in unprotected intercourse on August 31st, just before resuming the pills on September 4th, raises concerns about potential pregnancy.

The risk of pregnancy is highest when pills are missed during the first week of a new pack. Since you had unprotected sex on August 31st, which was just before you resumed taking the pills, there is a possibility that ovulation could have occurred, especially if you had not been taking the pills consistently. If ovulation occurred, and sperm was present, fertilization could happen, leading to a potential pregnancy.

Regarding your symptoms of nipple tenderness, it's important to note that this can occur for various reasons, including hormonal fluctuations, premenstrual syndrome (PMS), or early signs of pregnancy. However, the absence of other common early pregnancy symptoms, such as breast swelling, increased discharge, or bleeding, may suggest that you are not pregnant.
To assess your pregnancy risk more accurately, consider the following steps:
1. Take a Pregnancy Test: If your period is late or you experience any unusual symptoms, taking a home pregnancy test can provide clarity. Most tests are reliable if taken at least one week after a missed period.

2. Consult Your Healthcare Provider: If you have concerns about potential pregnancy or the effects of missed pills, it's advisable to consult your healthcare provider. They can offer personalized advice and may suggest alternative contraceptive methods if needed.

3. Consider Backup Contraception: If you miss pills, using a backup method, such as condoms, until you've taken the pills consistently for seven days can help reduce the risk of unintended pregnancy.

4. Monitor Your Cycle: Keep track of your menstrual cycle and any symptoms you experience. This can help you identify patterns and understand your body better.

In summary, while there is a risk of pregnancy due to missed birth control pills and unprotected intercourse, the presence of specific symptoms can vary widely among individuals. Taking a pregnancy test and consulting with your healthcare provider will provide the most accurate information regarding your situation. Remember, consistent use of birth control is key to preventing unintended pregnancies, and if you find yourself frequently missing pills, it may be worth discussing alternative contraceptive options with your doctor.

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