Levonorgestrel tablets are emergency contraceptives and a highly effective progestin. If taken at the wrong time, it may cause pregnancy. This pill is for use up to 72 hours after sex, and it does not work if you take it more than 72 hours later. The earlier you take it, the more effective it is, and if you get pregnant on this medication, this child is okay to have because it has been proven through research that this medication does not cause an increased incidence of fetal malformations. As long as you can see the normal development of the fetus, you can have a normal pregnancy, and you can just have regular and good pregnancy checkups. There are many reasons for abnormal fetal development, and the use of emergency contraceptive pills does not increase the incidence of fetal malformations.