Should You Take Birth Control Pills? Your Cycle and Safety

Should I take birth control pills?

My menstrual cycle is usually very regular, coming every 14 days and lasting about 5-7 days.
I took birth control pills in June, and my period started on July 11.
Is the early onset of my period by three days due to the medication? By July 15, it was completely finished.
On July 18, I had unprotected intercourse for 10-20 minutes without ejaculation, and on July 20, I had unprotected intercourse again without ejaculation.
Afterward, about an hour later, I noticed some increased discharge that was slightly milky in color but did not have a strong odor.
Can you tell me if both instances of intercourse were during my safe period? Do I need to take emergency contraception? Would it be too late to take the medication?

Niming, 10~19 year old female. Ask Date: 2016/07/20

Dr. Cao Guotao reply Obstetrics and Gynecology

Hello, the chances of getting pregnant during the safe period are low, but it is best to take preventive measures beforehand.
If you are concerned, you may consider taking emergency contraception.
Do not rely solely on the safe period.
If your period is more than a week late, it is advisable to see a gynecologist.
Wishing you good health.

Reply Date: 2016/07/20

More Info

When considering whether to take birth control pills, it's essential to understand how they work, your menstrual cycle, and the implications of sexual activity during different phases of your cycle. Birth control pills, particularly combined oral contraceptives (COCs), are designed to prevent ovulation, thicken cervical mucus, and thin the uterine lining, thereby reducing the likelihood of pregnancy.

From your description, it seems you have been consistent with your menstrual cycle, which typically lasts 28 days, with a duration of 5-7 days. You mentioned that you started taking birth control pills around the time of your period, which is a common practice. Starting the pill during your period can provide immediate contraceptive protection if you begin within the first five days of your cycle. However, if you start taking the pill at a different time, it may take up to seven days for the contraceptive effects to become fully effective, depending on the type of pill.

In your case, since you started taking the pill on July 11 and had sexual intercourse on July 18 and July 20 without using a condom, it is crucial to consider the timing of your pill usage. If you took the pills consistently and correctly, the likelihood of pregnancy is significantly reduced. COCs are about 99% effective when taken as directed, meaning that if you missed any doses or took them at irregular times, the effectiveness could be compromised.

Regarding your question about whether the sexual encounters you described fall within a "safe period," it is important to note that the concept of a "safe period" is less reliable when using hormonal birth control. The pill effectively suppresses ovulation, so the risk of pregnancy is low regardless of whether you are in what would traditionally be considered a fertile window. However, if you are concerned about the timing of your pill intake or if you missed any doses, it may be wise to consider emergency contraception as a precautionary measure.

As for the changes in your menstrual cycle, such as the early onset of your period after starting the pill, this can be a common side effect as your body adjusts to the hormones. Some women experience changes in their cycle, including lighter periods or spotting, especially during the first few months of taking the pill. If these changes persist or if you have any concerns about your menstrual cycle or the effectiveness of your birth control, it is advisable to consult with a healthcare provider.

In summary, if you have been taking your birth control pills consistently and correctly, the risk of pregnancy from the sexual encounters you described is low. However, if you have any doubts about your pill regimen or experience unusual symptoms, it is always best to consult with a healthcare professional for personalized advice and reassurance. Regular check-ups and discussions about your contraceptive options can help ensure that you are using the most effective method for your needs.

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