Sperm Lifespan and Birth Control Pills for Women's Health - Obstetrics and Gynecology

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Sperm lifespan and contraceptives?


Hello, Doctor.
I have two concerns:
1.
In June of this year, I had my last sexual encounter with my ex-boyfriend before we broke up (at that time, I was pregnant, but the embryo did not develop).
I recently started dating a new boyfriend, but I am worried that my ex-boyfriend's sperm might still be inside me, which is why I am hesitant to engage in sexual activity with my current boyfriend for fear of pregnancy.
Is my concern valid? How long do sperm typically survive? Is it possible for sperm to remain viable for more than four months?
2.
I have polycystic ovary syndrome (PCOS), but I am afraid of becoming pregnant, so I want to take birth control pills until I feel mentally prepared to plan for pregnancy.
However, I am also getting older (I will be 38 next year).
Will taking birth control pills further decrease my chances of infertility? What is the difference between high-dose and low-dose birth control pills? Would it be better for me to take low-dose pills? Thank you, Doctor.

Miss Lin, 30~39 year old female. Ask Date: 2016/11/09

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, sperm cannot survive for more than four months.
Generally, birth control pills start with a low dose, and if they are well-tolerated, there is no need to switch to a higher dose.
Wishing you good health.

Reply Date: 2016/11/09

More Info


Your concerns about sperm lifespan and the implications of taking birth control pills, especially in the context of your health and future pregnancy plans, are valid and important to address.

1. Sperm Lifespan: Sperm can live inside a woman's reproductive tract for up to five days under optimal conditions, but they do not survive for months. After sexual intercourse, sperm can remain viable for a few days, but they will not remain alive for four months. Therefore, your concern about your previous boyfriend's sperm still being in your body after several months is unfounded. Once you have your menstrual cycle, any residual sperm would have been expelled from your body. If you have not engaged in sexual intercourse since your last period, you can be assured that you are not at risk of pregnancy from that encounter.

2. Birth Control Pills and PCOS: Regarding your polycystic ovary syndrome (PCOS) and the use of birth control pills, it is common for women with PCOS to be prescribed hormonal contraceptives. Birth control pills can help regulate menstrual cycles, reduce androgen levels, and manage symptoms associated with PCOS. They can also provide a temporary solution to prevent pregnancy while you prepare for future family planning.
As for the concern about whether taking birth control pills will lower your chances of conceiving in the future, the answer is generally no. Birth control pills do not have a long-term negative effect on fertility. Once you stop taking them, your fertility typically returns to what it was before you started using them. However, it is essential to consult with your healthcare provider about your specific situation, especially considering your age and PCOS.

Regarding the difference between high-dose and low-dose birth control pills, low-dose pills contain lower levels of estrogen and progestin compared to high-dose pills. They are often preferred because they tend to have fewer side effects, such as nausea and headaches. However, the choice between high-dose and low-dose pills should be made in consultation with your healthcare provider, who can consider your medical history, current health status, and specific needs.

In summary, you do not need to worry about residual sperm from a previous relationship affecting your current situation. Sperm cannot survive for months in the female body. Additionally, using birth control pills can be a beneficial strategy for managing PCOS and preventing unintended pregnancy while you prepare for future family planning. Always consult with your healthcare provider to tailor a plan that best suits your health needs and future goals.

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