Taking contraceptive pills when you are pregnant will have some effect on the fetus, especially long-acting and short-acting pills, which have a greater possibility of causing fetal malformation or miscarriage. If you take the emergency contraceptive pill, the impact is generally relatively small, it is recommended that regular maternity checks to observe the development of the fetus, if there are abnormalities, timely treatment. 1, oral long-acting and short-acting contraceptives: the first three months of pregnancy, some pregnant women have less early pregnancy reaction or even no early pregnancy reaction, resulting in the case of taking the pill without knowing the pregnancy, this stage is an important period of fetal development, long-acting and short-acting contraceptives The estrogen in long-acting and short-acting contraceptives can easily lead to fetal malformation or even miscarriage, although it is not 100% teratogenic, but the teratogenic rate is relatively high. Therefore, if a pregnant woman takes long-acting or short-acting contraceptive pills at this stage, it is recommended to go to the hospital in time to check the development of the fetus and choose carefully whether to continue the pregnancy under the guidance of the doctor; 2. Oral emergency contraceptive pills: Generally, the main component of emergency contraceptive pills is progestin, and the content is relatively small, so the impact on the fetus is relatively small, and the pregnancy can generally continue, and it is necessary to carry out the maternity examination on time. If the fetus is found to be abnormal, promptly follow the doctor’s instructions for treatment, and at the same time need to pay attention to rest, supplement folic acid and stay away from radiation.