Maternal-fetal immunity and recurrent spontaneous abortion

Area of Science:

• Reproductive Immunology
• Maternal-Fetal Medicine
• Immunogenetics

Background:

• Recurrent Spontaneous Abortion (RSA) affects 40-50% of cases, termed Unexplained RSA (URSA), with challenging clinical management due to unknown causes.
• Advances in reproductive immunology suggest a significant link between URSA and maternal-fetal immune interactions.
• This review focuses on the immunological underpinnings of RSA, aiming to provide a framework for understanding and managing this condition.

Purpose of the Study:

• To provide an immunological perspective on the pathogenesis, diagnosis, and treatment of RSA.
• To review the complex immunological mechanisms involved in RSA, including immune tolerance, cell function, and microbiota.
• To discuss current diagnostic and therapeutic strategies for RSA from an immunological viewpoint.

Main Methods:

• Comprehensive literature review of immunological mechanisms in RSA.
• Analysis of maternal-fetal interface immune tolerance and cell function.
• Examination of gut and vaginal microbiota's role in immune dysregulation related to RSA.

Main Results:

• Identified key immunological factors in RSA: impaired maternal-fetal immune tolerance, altered immune cell function, and microbiota-mediated immune anomalies.
• Reviewed current diagnostic approaches and existing treatments for RSA, noting limitations.
• Highlighted the need for further research into the immunological etiology of RSA.

Conclusions:

• Immunological factors play a critical role in RSA pathogenesis, though many aspects remain poorly understood.
• Effective diagnostic tools for immunological causes of RSA are currently lacking.
• The efficacy and safety of current immunotherapies for RSA, such as lymphocyte immunotherapy and IVIg, require further investigation and remain contentious.