<unk>  or maternal<unk><unk>  is the<unk><unk>  shown towards the fetus and placenta during pregnancy. This<unk>  counters the<unk>  response that would normally result in the rejection of something foreign in the body, as can happen in cases of spontaneous abortion. It is studied within the field of reproductive<unk> logy.
Immune tolerance in pregnancy
Immunization during pregnancy
Maternal physiological changes in pregnancy
High-risk pregnancy
Postpartum infections
Sexual activity during pregnancy
Pre-existing disease in pregnancy
Thyroid disease in pregnancy