Emergency Contraception and Menstrual Irregularities - Obstetrics and Gynecology

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Emergency contraception (EC) is a method used to prevent pregnancy after unprotected sexual intercourse or contraceptive failure. The most common form of emergency contraception is the use of hormonal pills, such as Plan B (levonorgestrel) or Ella (ulipristal acetate). In your case, you mentioned taking a single dose of 1.5 mg of levonorgestrel (commonly referred to as "愉婷錠") within 12 hours after unprotected intercourse, which is an appropriate and timely use of emergency contraception.

It is important to understand that while emergency contraception is effective in preventing pregnancy, it does not guarantee that menstruation will occur as expected afterward. The hormonal changes induced by the emergency contraceptive can lead to various side effects, including menstrual irregularities. It is not uncommon for individuals to experience changes in their menstrual cycle after taking emergency contraception. This can include delayed menstruation, lighter or heavier bleeding, or even skipped periods.

In your situation, you mentioned that you have not had a menstrual period for nearly two months prior to taking the emergency contraception. This absence of menstruation, known as amenorrhea, can be attributed to several factors, including hormonal imbalances, stress, significant weight changes, or underlying medical conditions such as polycystic ovary syndrome (PCOS) or thyroid disorders. The fact that you have experienced lower abdominal discomfort and elevated body temperature could also indicate other underlying issues, such as an infection or other gynecological conditions.

Given that you have taken emergency contraception and are experiencing these symptoms, it is essential to monitor your condition closely. If your period does not arrive within a week or two, or if your symptoms worsen, it would be advisable to consult a healthcare provider. They may recommend a pregnancy test to rule out pregnancy, especially since you had unprotected intercourse. Additionally, they may conduct further evaluations to determine the cause of your amenorrhea and abdominal discomfort.

In summary, while emergency contraception is an effective method to prevent pregnancy, it can lead to menstrual irregularities. Your lack of menstruation prior to taking the emergency contraceptive may also contribute to the current situation. It is crucial to keep track of your symptoms and seek medical advice if necessary to ensure your reproductive health is properly managed.