Why Did My Girlfriend's Period Stop After Oral Sex? - Obstetrics and Gynecology

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Oral sex with your girlfriend while she hasn't gotten her period?


My girlfriend is a virgin and we have not engaged in sexual intercourse; I only performed oral sex on her.
Why did her period suddenly stop? Her menstrual cycle was normal before, but it became a bit irregular after she started working night shifts.
After the oral sex, her period has not come.
What could be happening? Should she go to the hospital for an examination immediately?

A Jun, 20~29 year old female. Ask Date: 2016/07/01

Dr. Lü Lizheng reply Obstetrics and Gynecology


Oral sex does not affect menstruation and cannot lead to pregnancy.
If your period is late, it is likely due to hormonal imbalance, which can be caused by working night shifts and lack of sleep.
If your period has been absent for an extended period, you should consult a doctor.
Sincerely, Dr.
Lu Li-Cheng.

Reply Date: 2016/07/01

More Info


It's understandable to be concerned when your girlfriend's menstrual cycle suddenly changes, especially after engaging in oral sex. However, it's important to clarify that oral sex itself does not directly affect menstrual cycles or cause pregnancy. The cessation of menstruation can be attributed to several factors, and in your girlfriend's case, it seems more likely related to lifestyle changes rather than the sexual activity you engaged in.

Firstly, you mentioned that your girlfriend has been working night shifts. Shift work, particularly night shifts, can significantly disrupt the body's circadian rhythms and hormonal balance. The menstrual cycle is regulated by a complex interplay of hormones, and any disruption in this balance can lead to irregularities. Stress, changes in sleep patterns, and alterations in daily routines can all contribute to hormonal fluctuations, which may explain why her period has become irregular.

Additionally, factors such as stress, anxiety, changes in diet, and even weight fluctuations can impact menstrual cycles. If your girlfriend has been experiencing increased stress due to her job or other life circumstances, this could also be a contributing factor. It's worth noting that many women experience changes in their menstrual cycles during periods of stress or significant life changes.

Regarding the need for medical attention, if your girlfriend's period does not return within a reasonable timeframe or if she experiences other concerning symptoms (such as severe pain, excessive bleeding, or other unusual signs), it would be advisable for her to consult a healthcare professional. A doctor can perform a thorough evaluation, including a physical examination and possibly some blood tests, to determine if there are any underlying health issues that need to be addressed.

In summary, while it is unlikely that oral sex caused your girlfriend's missed period, the changes in her work schedule and potential stressors in her life are more plausible explanations. Encourage her to monitor her symptoms and seek medical advice if her menstrual irregularity persists or if she has any other health concerns. Open communication about health and well-being is crucial in any relationship, so supporting her in seeking help can be beneficial for both of you.

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