Maternal immune tolerance prevents the rejection of the fetus
Extensive immunological and clinical evidence demonstrates that maternal immune tolerance is essential to prevent the rejection of the semi-allogeneic fetus during a successful pregnancy.
All retrieved papers uniformly support the foundational immunological concept that successful pregnancy requires maternal immune tolerance toward the semi-allogeneic fetus, and that failures in this tolerance mechanism lead to rejection or pregnancy complications like preterm birth and preeclampsia.
Yongmei Shen, Yaqi Li, Jiasong Cao, Wen Li, Qimei Lin, Jianxi Wang, Zhuo Wei, Ying Chang. Mechanisms of Immune Tolerance and Inflammation via Gonadal Steroid Hormones in Preterm Birth. 2023. https://doi.org/10.1097/fm9.0000000000000199
Paper 0 notes that the disruption of maternal immune tolerance is associated with pregnancy complications such as preterm birth.
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Wenyan Fu, Zetong Ma, Changhai Lei, Min Ding, Shi Hu. TIGIT-Fc Promote Immune Tolerance at the Feto-maternal Interface. 2019. https://doi.org/10.1101/819243
Paper 1 demonstrates that promoting immune tolerance at the feto-maternal interface via regulatory pathways is critical for successful pregnancy.
Andonotopo. Perinatal Immune Adaptation and Tolerance at the Maternal–Fetal Interface: A Systematic Review. 2025. https://doi.org/10.21203/rs.3.rs-7892729/v1
Paper 2's systematic review confirms that pregnancy requires the maternal immune system to tolerate the semi-allogeneic fetus.
Yuanshan Zhang. Inflammatory Burden–Driven Bistability of Maternal–Fetal Immune Tolerance: A Framework for Pregnancy Complications. 2026. https://doi.org/10.20944/preprints202606.1469.v1
Paper 3 outlines the necessity of maternal-fetal immune tolerance to maintain a semi-allogeneic fetus while preventing complications.
Yuanshan Zhang. Inflammatory Load-Driven Bistability of Maternal–Fetal Immune Tolerance: A Unified Framework for Pregnancy Complications. 2026. https://doi.org/10.20944/preprints202606.1469.v2
Paper 4 states that maternal tolerance of the semi-allogeneic fetus is fundamental to a successful pregnancy.
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