Can You Use Yaz for Birth Control Without a Period? - Obstetrics and Gynecology

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After taking Yuzhi for six months to treat polycystic ovary syndrome, I stopped the medication for one month.
However, I did not have a menstrual period during that month.
If I continue taking Yuzhi without having a menstrual period, will it still be effective for contraception after one week of use? Or is it necessary to have a menstrual period before starting Yuzhi? Thank you, doctor!

Xiao Yang, 20~29 year old female. Ask Date: 2022/11/15

Dr. Cao Guotao reply Obstetrics and Gynecology


Hello, it is generally recommended to start taking contraceptive pills on the fifth day of your menstrual period.
You can also visit a gynecologist to obtain medication to induce menstruation.
Wishing you good health.

Reply Date: 2022/11/15

More Info


When it comes to using Yaz (a combination oral contraceptive pill) for birth control without having a menstrual period, it's important to understand how these medications work and the implications of starting them under such circumstances.

Yaz contains a combination of estrogen and progestin, which work together to prevent ovulation, thicken cervical mucus, and thin the uterine lining. These mechanisms are effective for preventing pregnancy. However, the timing of when to start taking Yaz can be crucial, especially if you have not had a menstrual period for some time, as in your case after stopping the medication for a month.

In general, if you have not had a period, it is advisable to take a pregnancy test before starting Yaz to rule out pregnancy. If the test is negative, you can start taking Yaz even if you do not have a period. The recommendation is to start taking the pill at least seven days before engaging in unprotected intercourse to ensure that you are adequately protected against pregnancy. This is because it typically takes about seven days for the hormones in Yaz to reach effective levels in your body.

If you start Yaz without having a period, you may experience some irregular bleeding or spotting as your body adjusts to the hormones. This is not uncommon and can happen when starting or restarting hormonal contraceptives. However, it is essential to monitor your body’s response and consult with your healthcare provider if you have concerns about irregular bleeding or if you experience any unusual symptoms.

It's also worth noting that if you have a condition like polycystic ovary syndrome (PCOS), which you mentioned in your question, hormonal contraceptives like Yaz can help regulate your menstrual cycle and manage symptoms. However, the absence of a period can sometimes indicate underlying issues that may need to be addressed, such as hormonal imbalances or other health concerns.

In summary, you can use Yaz for birth control without having a period, but it is crucial to confirm that you are not pregnant first. Start taking the pill as directed, and be aware that it may take some time for your body to adjust. If you have any concerns or experience significant changes, it’s always best to consult with your healthcare provider for personalized advice and management. They can provide guidance tailored to your specific health needs and help ensure that you are using Yaz effectively for birth control.

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Dr. Cao Guotao reply Obstetrics and Gynecology
Hello, I have responded to your inquiry. Wishing you good health.

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