Hi, Postinor 2SD is an emergency contraceptive pill that is designed to prevent pregnancy if taken within 72 hours of unprotected sex. It works by delaying or preventing ovulation, thus preventing fertilization from occurring. If pregnancy occurs despite the use of Postinor 2SD, there is no evidence to suggest that it will cause birth defects in the baby. However, there is a risk of ectopic pregnancy, which is a potentially life-threatening condition that requires immediate medical attention. Regarding fibroid, it may cause complications during pregnancy, including miscarriage, preterm labor, and problems with fetal growth and development. The severity of the risk depends on the size and location of the fibroid, as well as other factors. It is important to discuss your concerns with your healthcare provider, who can provide you with personalized information and guidance based on your individual medical history and current condition. They can also monitor you closely throughout your pregnancy to ensure the best possible outcome for you and your baby. Take care. Hope I have answered your question. Let me know if I can assist you further. Regards, Dr. Priyanka, General & Family Physician