Hello, I appreciate your query. The failure rate of emergency contraceptive pills is very low, hence it is unfortunate that it failed in your case. However, all recent studies so far have shown that pregnancies after failure of emergency contraceptive pills are safe. There is no association between the use of emergency contraceptive pills and the risk of major congenital malformations, pregnancy complications or any other adverse pregnancy outcomes . So, do not worry about anything at this stage. I am attaching references to the above statement for your perusal, however, these are worded technically, but you should be able to get a gist of the results. The references are 1. http://humrep.oxfordjournals.org/content/24/7/1605.long 2. http://www.ncbi.nlm.nih.gov/pubmed/16084867 Regarding the possibility of ectopic pregnancy, emergency contraceptives do not increase the risk of ectopic pregnancy also. The reference i cite is given below http://sexualityandu.ca/uploads/files/Medical_and_Service_Delivery_Guidelines_Eng_2012.pdf Further quoting the relevant paragraph that you will find in this reference : A systematic review of world literature found that 1% of pregnancies occurring after use of the levonorgestrel regimen and 0.6% of pregnancies occurring after use of the mifepristone regimen were ectopic. These figures are similar to the risk that pregnancies not exposed to ECPs will be ectopic. Thus, the review concluded that neither regimen increases the chance that a pregnancy will be ectopic. Hence please be reassured. Have your ultrasound at the earliest to rule out ectopic pregnancy. Also, take prescribed prenatal vitamins, folic acid etc, and abstain from teratogenic agents ( smoking, alcohol etc ) to reduce chances of fetal malformations. All the best with your pregnancy.