Toxoplasma infections in pregnant women can lead to adverse effects such as miscarriage, preterm labor, teratogenicity or stillbirth. Toxoplasma gondii is an opportunistic pathogenic protozoan that can cause infection in humans and many animals. Felines are the final and intermediate hosts of Toxoplasma gondii, while humans are intermediate hosts. After initial infection with Toxoplasma gondii during pregnancy, the parasite can be transmitted to the fetus via the placenta. Infection in the first three months of pregnancy can cause miscarriage, preterm labor, teratology or stillbirth, with the highest incidence of teratology, such as anencephaly, microcephaly, spina bifida, and so on. If a pregnant woman is infected with Toxoplasma gondii in the second trimester of pregnancy, most of the infected fetuses will show hidden infection, and some of them will not show symptoms until months or even years after birth. Toxoplasma infections in pregnant women can have serious consequences, and it is important to avoid contact with felines that may be infected with toxoplasmosis or spending too much time in environments where toxoplasmosis may be present during pregnancy.