Can You Take Emergency Contraception After Starting Birth Control? - Obstetrics and Gynecology

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When it comes to the use of emergency contraception (EC) after starting a birth control regimen, it is important to understand how these methods work and their interactions. In your case, you began taking birth control pills on July 13, which was the first day of your menstrual period. You had unprotected intercourse on July 17, just four days into your pill regimen.
Typically, most birth control pills take about seven days to become fully effective in preventing pregnancy. Therefore, during the first week of starting the pill, especially if it is your first time using it, you are advised to use an additional form of contraception, such as condoms, to ensure protection. Since you had unprotected intercourse within this timeframe, there is a possibility of pregnancy, and using emergency contraception could be a prudent choice.

Emergency contraception is designed to prevent pregnancy after unprotected intercourse or contraceptive failure. There are two main types of EC: hormonal pills (like Plan B or Ella) and the copper intrauterine device (IUD). Hormonal EC is most effective when taken as soon as possible after unprotected sex, ideally within 72 hours, but some types can be effective up to five days later. The copper IUD can be inserted by a healthcare provider within five days of unprotected intercourse and is the most effective form of emergency contraception.

Regarding your concern about taking emergency contraception while on birth control pills, it is generally safe to do so. The hormonal content in emergency contraception does not interfere with the effectiveness of your regular birth control pills. However, it is important to note that taking EC can cause some temporary side effects, such as nausea, fatigue, or changes in your menstrual cycle, which may overlap with the side effects of the birth control pills.

If you decide to take emergency contraception, it is advisable to continue taking your birth control pills as prescribed. After taking EC, you should also continue to use additional contraception (like condoms) for at least seven days or until you have taken your birth control pills consistently for seven days. This is to ensure that you are fully protected against pregnancy.

In summary, since you are within the window where emergency contraception can be effective, and considering the timing of your unprotected intercourse, it would be wise to consider taking EC. It will not conflict with your birth control pills, and you should continue taking your regular pills as directed. If you have any further concerns or questions about your specific situation, it is always best to consult with a healthcare provider for personalized advice. They can provide guidance based on your health history and any other factors that may be relevant to your situation.