The fetus contains foreign genetic material coming from the father, but in normal circumstances it does not get rejected. However, in some women the immune system may reject the fetus and cause a miscarriage either by being high in numbers or by abnormal hostile activity. There are several immune disorders:-
Miscarriage Causes: Immune Mechanisms
What are Antithyroid Antibodies?
Thyroid antibodies have been associated with first trimester miscarriages.
In one study 70% of women with recurrent first trimester losses had thyroid antibodies, compared to 17% of controls.
Treatment for thyroid antibodies
If your results revealed that you have positive thyroid antibodies, I will offer you treatment with Prednisolone.