Can I Start Taking Birth Control Pills If My Period Is Late?

Oral contraceptives

I previously experienced irregular menstruation and after consulting a doctor, I was recommended to take birth control pills to regulate my cycle.
I took them for about 9 months and took a break last month.
I was supposed to continue taking Yaz this month, but my period, which was due last week, has not arrived yet.
Can I start taking Yaz directly?

Miss Lin, 10~19 year old female. Ask Date: 2021/04/08

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, start taking the contraceptive pill on the fifth day of your menstrual period.
Wait for another week, and if your period still hasn't arrived, it is advisable to see a gynecologist.
Wishing you good health.

Reply Date: 2021/04/08

More Info

When it comes to starting birth control pills, particularly if your period is late, there are several important factors to consider. First and foremost, it's essential to determine whether you might be pregnant. If your period is late and you have had unprotected intercourse, it is advisable to take a pregnancy test before starting any hormonal contraceptives. Birth control pills, including the one you mentioned (Yaz), are not intended for use during pregnancy and can potentially harm a developing fetus.

If the pregnancy test is negative and you are certain that you are not pregnant, you can generally start taking the birth control pills even if your period is late. However, it is recommended to consult with your healthcare provider before doing so. They can provide personalized advice based on your medical history and the reasons for your irregular periods.

In cases where a woman has a history of irregular menstrual cycles, starting birth control pills can help regulate the cycle. The hormones in the pills work by preventing ovulation and stabilizing the uterine lining, which can lead to more predictable menstrual cycles. However, if you have been experiencing irregularities, it’s crucial to understand the underlying causes. Conditions such as polycystic ovary syndrome (PCOS), thyroid disorders, or other hormonal imbalances can lead to irregular periods, and these should be addressed with your healthcare provider.

If you decide to start the birth control pills while your period is late, keep in mind that it may take some time for your body to adjust to the hormones. You might experience some side effects during the initial months, such as spotting, mood changes, or breast tenderness. These are generally temporary, but if they persist or worsen, it’s important to follow up with your doctor.

Additionally, if you do start taking the pills and your period does eventually arrive, it’s usually not a cause for concern. You can continue taking the pills as directed, and your cycle may become more regular over time. However, if you experience heavy bleeding or severe pain, you should seek medical attention.

In summary, if your period is late, take a pregnancy test first. If negative, consult your healthcare provider about starting the birth control pills. They can help you navigate your specific situation, ensuring that you make the best decision for your health and well-being. Remember that open communication with your healthcare provider is key to managing your reproductive health effectively.

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