I don't know what to do if I take contraceptives during pregnancy

Do not know that pregnancy under the premise of taking contraceptives may affect fetal development, but does not necessarily lead to the birth of abnormal fetuses; early pregnancy should be timely supplemented folic acid, to ensure a balanced diet, can be in the 12 weeks of pregnancy to the hospital obstetrics do early Tang screening; if Tang screening structure normal, can retain the fetus.