[The mother-placenta-fetus system in maternal thyroid diseases].

In maternal thyroid diseases, the placenta shows an increase in complications during pregnancy. There are signs of lesions as alterations, focal sclerosis, and fibrinoid necrosis. There is also a circulatory disorder as plethora and thrombosis. Progression in these changes correlates with the cases of miscarriage and other pathology in the obstetric history. The concurrence of obstetric and endocrine diseases increases the risk of pregnancy, labor, and delivery complications in different maternal thyroid diseases.