It does not matter if you take the pill without knowing you are pregnant, because the pill is a synthetic preparation, the main components of which are estrogen and progestin, which have no adverse effects on the normal development of the fetus in early pregnancy. If the pill is an anti-progestin such as mifepristone, it may affect the normal development of the embryo and even lead to miscarriage. It is advisable to take the pill to the hospital and consult a doctor. In case of synthetic formulations of birth control pills, it is recommended to enhance pregnancy monitoring by doing hormone level measurement as well as ultrasound examination to monitor the development of the gestational sac in early pregnancy. As the fetus develops, we should do relevant screening tests, such as NT test, Down’s syndrome screening and 4D ultrasound, and if necessary, non-invasive DNA test.