Menstrual Irregularities and First-Time Sexual Experiences - Obstetrics and Gynecology

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What should I do if my period starts during sexual intercourse?


Hello, doctor.
My last menstrual period was from August 9 to August 14, but this month it has not arrived yet.
I visited a doctor on September 12, and he said he couldn't confirm if I had ovulated, but he prescribed medication to induce my period and told me to take it if my period didn't come by September 20.
However, I've been experiencing mild abdominal pain, feeling like my period is about to start.
Today (September 15), I had sexual intercourse with my boyfriend for the first time; his penis fully penetrated without a condom, but he did not ejaculate.
Afterward, I noticed blood on the sheets and tissue, and it was quite a bit.
Can you tell me if that blood is menstrual blood or from the rupture of the hymen? I have never had sexual intercourse before, but my boyfriend seemed not to feel the hymen when he entered.
Why is that? Is there a risk of pregnancy from this encounter? Should I take emergency contraception? Thank you, doctor.

Niming, 10~19 year old female. Ask Date: 2016/09/15

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, if you are concerned about pregnancy, it is advisable to take emergency contraception.
It is best to use preventive measures beforehand and not to rely on the fertility awareness method.
If you have unusual bleeding or if your period is more than a week late, it is recommended to consult a gynecologist.
Wishing you good health.

Reply Date: 2016/09/15

More Info


Understanding menstrual irregularities and first-time sexual experiences can be quite complex, especially when combined with the emotional and physical aspects of engaging in sexual activity for the first time. It’s important to address your concerns with a comprehensive understanding of both the physiological and psychological factors involved.

Firstly, menstrual irregularities can occur for a variety of reasons, including stress, hormonal imbalances, changes in weight, and lifestyle factors. In your case, since you mentioned that your period was due on September 9 and you experienced some abdominal discomfort, it’s possible that your body is experiencing some hormonal fluctuations. The doctor’s recommendation to take medication to induce menstruation is a common approach when there is a significant delay, but it’s essential to follow up if your symptoms persist or worsen.

Regarding your first sexual experience, it’s not uncommon for individuals to have concerns about bleeding. The presence of blood after your first sexual encounter can be attributed to several factors. If you have not engaged in sexual activity before, there is a possibility that the hymen, a thin membrane that partially covers the vaginal opening, may have been stretched or torn during penetration, leading to some bleeding. However, it’s also possible that the blood you observed could be related to your menstrual cycle, especially since you mentioned experiencing abdominal pain similar to menstrual cramps.

It’s worth noting that the hymen can vary significantly in elasticity and thickness among individuals. Some people may have a very elastic hymen that does not tear during first-time intercourse, which could explain why your boyfriend did not feel any obstruction. Additionally, the absence of ejaculation during intercourse does not eliminate the risk of pregnancy, as pre-ejaculate fluid can contain sperm. Therefore, if you are concerned about the possibility of pregnancy, it would be prudent to consider emergency contraception, commonly referred to as the "morning-after pill," especially since you mentioned that you did not use a condom.

In terms of your emotional response to this experience, it’s normal to feel a mix of emotions after your first sexual encounter. Many people experience anxiety or worry about their performance, the physical sensations involved, and the potential consequences of their actions. Open communication with your partner about your feelings, boundaries, and expectations can help alleviate some of this anxiety. It’s also beneficial to educate yourself about sexual health, consent, and safe practices to enhance your comfort and confidence in future encounters.

If you continue to experience irregularities in your menstrual cycle or have concerns about your reproductive health, it’s advisable to consult with a healthcare professional who can provide personalized guidance and support. They can help you understand your body better and address any underlying issues that may be affecting your menstrual cycle or sexual health.

In summary, while your experience is not uncommon, it’s essential to approach it with a balanced understanding of both the physical and emotional aspects involved. Open communication with your partner, education about sexual health, and consultation with a healthcare provider are key steps in navigating this new chapter in your life.

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