Long-term dog ownership will not lead to infertility. Long-term dog ownership can cause bacterial or viral infections, and if the dog is not vaccinated on time, rabies can easily be caused by bites. Dogs can easily carry Toxoplasma gondii, and frequent contact with dogs during pregnancy preparation may lead to Toxoplasma gondii infection, which may affect fetal development after pregnancy and cause fetal malformation in serious cases. For the sake of safety, do not contact with dogs during the preparation period, it is better not to have dogs at home, pay attention to indoor hygiene, exercise properly, go to the hospital to check the four eugenics items during the preparation period, if everything is normal before pregnancy, and do not use drugs indiscriminately during the preparation period to avoid affecting the fetal development. If you are infertile, you need to go to the hospital for examination, which may be caused by endocrine disorders, fallopian tube failure, ovulation abnormalities, gynecological inflammation, and it is best to identify the cause and treat the symptoms before you can get pregnant.