Doxycycline tablets belong to a kind of tetracycline antibiotics, commonly used in the treatment of chlamydia and mycoplasma infections, usually take doxycycline tablets at least three months before you can prepare for pregnancy. Taking doxycycline tablets in large doses can lead to impaired liver function, in addition, there may be some drug residues in the body after stopping taking doxycycline tablets. If pregnancy occurs too early, the residual drug in the mother’s body is transported to the fetus through the placenta, which may affect the development of the embryo and cause fetal abnormalities, so it is recommended to prepare for pregnancy three months after taking the drug. In general, it is better to prepare for pregnancy three months after stopping taking any medication that affects the development of the fetus. During the preparation period, if you have any uncomfortable symptoms, it is recommended not to blindly use medication, and should be treated under the guidance of a doctor, so as to avoid some medications affecting the health of the fetus.