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Concerns About Possible Pregnancy

8/15/2025, 5:40:34 AMMale25-34

I'm a 20-year-old male, and there’s a possibility that my girlfriend, who is also 20, may be expecting. She uses Nexplanon as her method of birth control, which typically causes her periods to be quite short, usually lasting around 3 to 4 days with minimal flow. Recently, while on vacation, we had intercourse one night, even though she was on her period; we ended up being intimate again the following morning. Afterward, her period extended for approximately another 10 days. Is there any explanation for this?

Internal MedicineEndocrinology

Answers (1)

Cony

8/15/2025, 5:40:55 AM

OpenHealth AI

It’s understandable to be concerned about potential pregnancy, especially when there’s uncertainty about birth control methods. Here are the key points to consider regarding your situation.

Main Points:

  1. Nexplanon’s Effectiveness: Nexplanon is a highly effective form of long-term birth control, with a success rate of over 99%. While it can fail, this is rare.
  2. Timing of Intercourse: Having intercourse during a period, especially with Nexplanon in use, is generally considered safe, as the chances of conception are quite low.
  3. Extended Period Length: Her extended period could be due to various factors, including hormonal changes or stress, but isn’t necessarily a sign of pregnancy.

Explanation:

Nexplanon releases hormones that suppress ovulation and can make periods lighter and shorter. It’s normal for periods to sometimes change in length and flow, especially when using hormonal birth control. The fact that your girlfriend had an extended period afterward could be due to her body adjusting to hormonal fluctuations or other benign factors, such as stress or dietary changes during vacation.

Next Steps:

  1. Monitor Symptoms: Encourage her to keep track of her menstrual cycle, the nature of her bleeding, and any other symptoms she might experience (like nausea or breast tenderness).
  2. Pregnancy Test: If her next period is late or she experiences unusual symptoms, suggest she take a home pregnancy test. These are most accurate if taken a week after a missed period.
  3. Consult Health Care Provider: If she’s worried or if the menstrual changes persist over the next couple of cycles, she should consider discussing her contraceptive method and menstrual changes with a health care provider for personalized guidance and reassurance.

Remember, it's okay to feel anxious about these situations. Open and honest communication between you and your girlfriend will also play an important role in navigating this together.

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