Hello, I'm Dr. Emily, a board-certified OB/GYN. I understand you're asking about the possibility of getting pregnant while on the pill. It's a common concern, and I'm here to provide you with accurate and reliable information.

The combined oral contraceptive pill, also known as the birth control pill, is a highly effective method of contraception when taken correctly. It works by preventing ovulation, the release of an egg from the ovary. This means that there's no egg available for fertilization by sperm, thus preventing pregnancy.

However, it's important to understand that **no contraceptive method is 100% effective**. There's always a small chance of pregnancy occurring, even with perfect use of the pill. This is because there are factors that can affect the pill's efficacy, such as:

* Missing pills: If you miss even one pill, the hormones in the pill may not be at the right levels to prevent ovulation. This makes you more susceptible to pregnancy.
* Certain medications: Some medications, like antibiotics, can reduce the effectiveness of the pill.
* Gastrointestinal issues: Severe vomiting or diarrhea can affect the absorption of the pill, leading to reduced effectiveness.
* Individual factors: Factors like weight gain or loss can also affect the pill's efficacy.

It's also important to note that the pill doesn't protect against sexually transmitted infections (STIs).

**Here's what you need to do to maximize the effectiveness of the pill:**

* **Take the pill at the same time every day:** This helps maintain a consistent level of hormones in your body.
* **Use a backup method of contraception, like a condom, if you miss a pill or are taking medications that interfere with the pill's efficacy.**
* See your doctor regularly: Your doctor can monitor your health and ensure that the pill is still the best option for you.

If you're concerned about the possibility of pregnancy, it's essential to take a pregnancy test. You can purchase a home pregnancy test at most drugstores.

Remember, if you have any concerns or questions about your birth control, it's crucial to talk to your doctor. They can provide you with personalized advice and ensure you're using the most effective method for your individual needs.

I hope this information has been helpful. Please don't hesitate to reach out to me if you have any further questions.
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Five Reasons Women Get Pregnant While on the Pill. More than 12 million U.S. women use the combined oral contraceptive pill, more commonly referred to as the pill. The pill is 99 percent effective in preventing pregnancy. Even so, between 2 and 8 percent of women become pregnant each year while using it.read more >>