Toxoplasma gondii infection in pregnant women will cause a series of serious consequences such as embryonic arrest, spontaneous abortion, preterm delivery and fetal malformation. 1. Toxoplasma gondii will stop the development of embryo: after pregnant women are infected with toxoplasma gondii, the toxoplasma gondii may pass through the placenta to infect the fetus, or even parasitize in the tissues and cells of the fetus, which will affect the growth and development of the embryo, and cause the development of the embryo to stop. 2. Spontaneous abortion: during the first three months of embryonic development, the resistance of the fetus is weak and the embryo is in the critical period of growth and development, if the pregnant woman is infected with Toxoplasma gondii at this time, it may lead to the phenomenon of abortion. 3. Preterm labor: If a pregnant woman is infected with Toxoplasma gondii in the middle of pregnancy, it may lead to preterm labor, and most of the preterm labor is accompanied by congenital defects. 4. Fetal deformities: After a pregnant woman is infected with Toxoplasma gondii, the Toxoplasma gondii infects the fetus through the placenta, which may lead to congenital deformities such as cerebral palsy and hydrocephalus. Toxoplasma infections in pregnant women, no matter at what stage of pregnancy, will have a great impact on the pregnant woman herself and the fetus. Therefore, it is important for pregnant women to undergo regular checkups during pregnancy and seek medical attention when problems are detected.