The immunological approach to pregnancy diagnosis: a review.

This study explores the immunological aspects of pregnancy diagnosis, particularly the role of the early pregnancy factor (EPF) in suppressing the mother’s immune system to prevent the rejection of the developing fetus.

Immune Rejection and Pregnancy

• According to the study, the developing fetus is not rejected by the mother’s body despite carrying antigens which are foreign. The fundamental concept behind this phenomenon is that the mother’s immune system doesn’t mount a rejection response against the fetus.
• In usual circumstances, the presence of foreign antigens would trigger the immune response, leading to the elimination of the foreign bodies. However, during pregnancy, a unique form of immunological tolerance is observed where the mother’s body does not reject the developing fetus.

Role of Early Pregnancy Factor (EPF)

• The research highlights the role of a particular factor in the serum of pregnant animals, named Early Pregnancy Factor (EPF), that has immunosuppressive properties.
• EPF plays a crucial part in suppressing the mother’s immune response to the fetus. This immunosuppressive property is considered to be one of the key reasons why the fetus is not rejected by the mother’s immune system.

EPF and Pregnancy Diagnosis

• One significant finding from the study is the fact that EPF can be detected as early as six hours after mating.
• This early detection of EPF could potentially serve as a tool for diagnosing pregnancy in various species at a very early stage.
• With its potential for early diagnosis, EPF has the potential to facilitate timely interventions, appropriate prenatal care, and possibly avert complications associated with delayed recognition of pregnancy.