Missed Period Concerns: Risks After Unprotected Intercourse

Missed menstruation?

On February 12, my boyfriend inserted without a condom for a few thrusts and then pulled out, after which he ejaculated outside.
I took emergency contraception afterward and experienced no significant side effects.
On February 14, I took Ella, but since then I've been experiencing intermittent abdominal pain without any bleeding.
I also took medication to induce menstruation on February 21, but my period still hasn't arrived.
My vaginal area feels moist, but there is no discharge.
What is the likelihood of pregnancy in this situation?

Pei Pei, 10~19 year old female. Ask Date: 2018/02/26

Dr. Huang Jianzhong reply Obstetrics and Gynecology

On February 12, my boyfriend inserted without a condom a few times and then pulled out, after which he ejaculated outside.
I took emergency contraception afterward, and I didn't experience any side effects.
On February 14, I took Ella, and since then I've been having intermittent abdominal pain but no bleeding.
I took medication to induce my period on February 21, but it still hasn't arrived.
My vaginal area feels moist, but there's no discharge.
What are the chances of pregnancy in this situation? Answer: Since there was a brief insertion without a condom on February 12, followed by taking emergency contraception and then Ella on February 14, the chances of pregnancy are low.

Reply Date: 2018/02/26

More Info

When it comes to missed periods and concerns following unprotected intercourse, it's essential to understand the various factors at play, including the timing of ovulation, the effectiveness of emergency contraception, and the body's response to hormonal changes.

In your situation, you had unprotected intercourse on February 12, and subsequently took emergency contraception (Plan B) and Ella (ulipristal acetate). Both of these medications are designed to prevent pregnancy after unprotected sex, but they work best when taken as soon as possible after the incident. Plan B is most effective within 72 hours, while Ella can be effective up to 120 hours after intercourse. However, neither method guarantees that pregnancy will be prevented, especially if ovulation has already occurred.

The abdominal pain you are experiencing could be a side effect of the emergency contraceptive pills. These medications can cause various side effects, including nausea, fatigue, headache, and abdominal discomfort. It's also worth noting that hormonal fluctuations caused by these pills can lead to changes in your menstrual cycle, which may result in a delayed period or even missed periods altogether.

Regarding the missed period, it's important to consider that stress, hormonal changes, and the use of emergency contraception can all impact your menstrual cycle. If you took the medications as directed, the likelihood of pregnancy is reduced, but not eliminated. If you are experiencing unusual symptoms, such as persistent abdominal pain or other concerning signs, it is advisable to consult with a healthcare provider for further evaluation.

In terms of the likelihood of pregnancy, if you have taken emergency contraception correctly and within the recommended time frame, the chances are relatively low. However, if your period does not arrive within a week or so of when it is expected, it would be prudent to take a home pregnancy test to rule out pregnancy. If the test is negative and your period still does not come, or if you have any other concerns, follow up with your healthcare provider for further guidance.

In summary, while the risk of pregnancy after taking emergency contraception is low, it is not zero. The abdominal pain you are experiencing could be a side effect of the medications, and hormonal changes may also be affecting your menstrual cycle. If your period does not arrive soon, consider taking a pregnancy test and consulting with a healthcare professional for personalized advice and support.

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