Emergency contraceptive pill
After having unprotected intercourse with my boyfriend, he ejaculated inside me.
I immediately took emergency contraception and a medication to induce menstruation.
What is the likelihood of becoming pregnant? When should I expect my period? Thank you, doctor.
Xiao Mei, 20~29 year old female. Ask Date: 2017/06/08
Dr. Cao Guotao reply Obstetrics and Gynecology
Hello, the chances of pregnancy are low, but it's best to take preventive measures at all times and not rely on the safe period.
Generally, you should expect your period to arrive within a week after taking menstrual regulation medication.
If your period does not come after more than a week, it is advisable to see a gynecologist.
Wishing you good health.
Reply Date: 2017/06/08
More Info
Emergency contraceptive pills (ECPs), commonly referred to as "morning-after pills," are designed to prevent pregnancy after unprotected intercourse or contraceptive failure, such as a broken condom. They are most effective when taken as soon as possible after the event, ideally within 72 hours, but some types can be effective up to 5 days later. The two main types of ECPs are levonorgestrel (Plan B One-Step) and ulipristal acetate (ella).
When you take ECPs, they work primarily by delaying ovulation. If ovulation has already occurred, ECPs may not be effective. Additionally, ECPs do not terminate an existing pregnancy; they prevent a pregnancy from occurring in the first place.
In your case, since you had unprotected intercourse with ejaculation inside and subsequently took ECPs along with menstrual induction medication, the risk of pregnancy is significantly reduced, but not entirely eliminated. The effectiveness of ECPs can vary based on several factors, including where you are in your menstrual cycle when you take them. If you took the ECPs shortly after intercourse, your chances of avoiding pregnancy are quite high.
Regarding your menstrual cycle, ECPs can cause some changes in your menstrual pattern. It is common for your next period to be earlier or later than expected, and the flow may be lighter or heavier than usual. If you took the ECPs, you might expect your period to arrive within a week or two of when it normally would. However, if your period is more than a week late, it is advisable to take a pregnancy test to confirm whether or not you are pregnant.
If you are experiencing any unusual symptoms, such as severe abdominal pain or persistent bleeding, it is important to consult with a healthcare provider. They can provide further evaluation and guidance based on your specific situation.
In summary, while the use of ECPs significantly reduces the risk of pregnancy after unprotected intercourse, it is not 100% effective. Monitoring your menstrual cycle after taking ECPs is important, and if you have any concerns or if your period is delayed, taking a pregnancy test or consulting with a healthcare professional is recommended.
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