{"id":23896,"date":"2025-06-23T23:40:00","date_gmt":"2025-06-23T21:40:00","guid":{"rendered":"https:\/\/clinicafertia.com\/?p=23896"},"modified":"2026-07-27T18:49:44","modified_gmt":"2026-07-27T16:49:44","slug":"immunology-and-fertility-2","status":"publish","type":"post","link":"https:\/\/clinicafertia.com\/en\/blog\/immunology-and-fertility-2","title":{"rendered":"Immunology and fertility"},"content":{"rendered":"<p>&nbsp;<\/p>\n<h2 data-start=\"0\" data-end=\"46\">The Role of the Immune System in Fertility<\/h2>\n<p data-start=\"48\" data-end=\"394\">One of the main functions of our immune system (IS) is to differentiate between self and foreign structures. During pregnancy, the IS must tolerate the presence of an organism that is immunologically different from maternal tissue: the embryo. Additionally, the IS plays an active role in the development of essential organs such as the placenta.<\/p>\n<p data-start=\"396\" data-end=\"490\">Alterations in immune system function can lead to diseases and complications during pregnancy.<\/p>\n<p>&nbsp;<\/p>\n<h2 data-start=\"492\" data-end=\"576\">What Immune-Related Issues Can Affect Fertility?<br data-start=\"544\" data-end=\"547\" \/>Antiphospholipid Syndrome<\/h2>\n<p data-start=\"578\" data-end=\"738\">This disorder occurs when the IS produces antibodies against the body\u2019s own proteins associated with phospholipids in vascular membranes. It is associated with:<\/p>\n<ul data-start=\"740\" data-end=\"865\">\n<li data-start=\"740\" data-end=\"791\">\n<p data-start=\"742\" data-end=\"791\">Increased risk of arterial or venous thrombosis<\/p>\n<\/li>\n<li data-start=\"792\" data-end=\"818\">\n<p data-start=\"794\" data-end=\"818\">Recurrent miscarriages<\/p>\n<\/li>\n<li data-start=\"819\" data-end=\"836\">\n<p data-start=\"821\" data-end=\"836\">Preterm birth<\/p>\n<\/li>\n<li data-start=\"837\" data-end=\"865\">\n<p data-start=\"839\" data-end=\"865\">Fetal growth restriction<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"867\" data-end=\"899\">The accepted treatment includes:<\/p>\n<ul data-start=\"901\" data-end=\"958\">\n<li data-start=\"901\" data-end=\"933\">\n<p data-start=\"903\" data-end=\"933\">Low molecular weight heparin<\/p>\n<\/li>\n<li data-start=\"934\" data-end=\"958\">\n<p data-start=\"936\" data-end=\"958\">Acetylsalicylic acid<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"960\" data-end=\"983\">Alloimmune Response<\/h2>\n<p data-start=\"985\" data-end=\"1124\">In this reaction, the body recognizes the embryo\u2019s cells\u2014which carry paternal genetic material\u2014as foreign. Investigations typically assess:<\/p>\n<ul data-start=\"1126\" data-end=\"1189\">\n<li data-start=\"1126\" data-end=\"1151\">\n<p data-start=\"1128\" data-end=\"1151\">Maternal KIR genotype<\/p>\n<\/li>\n<li data-start=\"1152\" data-end=\"1189\">\n<p data-start=\"1154\" data-end=\"1189\">Maternal and paternal\/donor HLA-C<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1191\" data-end=\"1263\">NK cells make up 70\u201390% of uterine lymphocytes. Their functions include:<\/p>\n<ul data-start=\"1265\" data-end=\"1382\">\n<li data-start=\"1265\" data-end=\"1303\">\n<p data-start=\"1267\" data-end=\"1303\">Controlling blood vessel formation<\/p>\n<\/li>\n<li data-start=\"1304\" data-end=\"1340\">\n<p data-start=\"1306\" data-end=\"1340\">Facilitating embryo implantation<\/p>\n<\/li>\n<li data-start=\"1341\" data-end=\"1382\">\n<p data-start=\"1343\" data-end=\"1382\">Developing a tolerant immune response<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1384\" data-end=\"1405\">KIR receptors can be:<\/p>\n<ul data-start=\"1407\" data-end=\"1450\">\n<li data-start=\"1407\" data-end=\"1428\">\n<p data-start=\"1409\" data-end=\"1428\">KIR A: inhibitory<\/p>\n<\/li>\n<li data-start=\"1429\" data-end=\"1450\">\n<p data-start=\"1431\" data-end=\"1450\">KIR B: activating<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1452\" data-end=\"1622\">Maternal genotypes may be AA, AB, or BB. These receptors interact with HLA-C, which is inherited from both parents. The combination of KIR AA + HLA-C2 has been linked to:<\/p>\n<ul data-start=\"1624\" data-end=\"1681\">\n<li data-start=\"1624\" data-end=\"1639\">\n<p data-start=\"1626\" data-end=\"1639\">Miscarriage<\/p>\n<\/li>\n<li data-start=\"1640\" data-end=\"1664\">\n<p data-start=\"1642\" data-end=\"1664\">Implantation failure<\/p>\n<\/li>\n<li data-start=\"1665\" data-end=\"1681\">\n<p data-start=\"1667\" data-end=\"1681\">Preeclampsia<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1683\" data-end=\"1714\">Recommended approaches include:<\/p>\n<ul data-start=\"1716\" data-end=\"1800\">\n<li data-start=\"1716\" data-end=\"1742\">\n<p data-start=\"1718\" data-end=\"1742\">Single embryo transfer<\/p>\n<\/li>\n<li data-start=\"1743\" data-end=\"1800\">\n<p data-start=\"1745\" data-end=\"1800\">Selection of compatible gametes in recipient patients<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"1802\" data-end=\"1854\">Undiagnosed Celiac Disease or Gluten Sensitivity<\/h2>\n<p data-start=\"1856\" data-end=\"1884\">This may be associated with:<\/p>\n<ul data-start=\"1886\" data-end=\"1928\">\n<li data-start=\"1886\" data-end=\"1901\">\n<p data-start=\"1888\" data-end=\"1901\">Infertility<\/p>\n<\/li>\n<li data-start=\"1902\" data-end=\"1928\">\n<p data-start=\"1904\" data-end=\"1928\">Recurrent miscarriages<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"1930\" data-end=\"2002\">Treatment involves a strict gluten-free diet following proper diagnosis.<\/p>\n<h2 data-start=\"2004\" data-end=\"2027\">Autoimmune Diseases<\/h2>\n<p data-start=\"2029\" data-end=\"2106\">These are conditions in which the IS attacks the body\u2019s own tissues, such as:<\/p>\n<ul data-start=\"2108\" data-end=\"2205\">\n<li data-start=\"2108\" data-end=\"2132\">\n<p data-start=\"2110\" data-end=\"2132\">Rheumatoid arthritis<\/p>\n<\/li>\n<li data-start=\"2133\" data-end=\"2155\">\n<p data-start=\"2135\" data-end=\"2155\">Multiple sclerosis<\/p>\n<\/li>\n<li data-start=\"2156\" data-end=\"2185\">\n<p data-start=\"2158\" data-end=\"2185\">Autoimmune hypothyroidism<\/p>\n<\/li>\n<li data-start=\"2186\" data-end=\"2205\">\n<p data-start=\"2188\" data-end=\"2205\">Crohn\u2019s disease<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2207\" data-end=\"2303\">If well-controlled and in the absence of active flare-ups, patients can plan for pregnancy with:<\/p>\n<ul data-start=\"2305\" data-end=\"2386\">\n<li data-start=\"2305\" data-end=\"2346\">\n<p data-start=\"2307\" data-end=\"2346\">Multidisciplinary medical supervision<\/p>\n<\/li>\n<li data-start=\"2347\" data-end=\"2386\">\n<p data-start=\"2349\" data-end=\"2386\">Prevention of inflammatory episodes<\/p>\n<\/li>\n<\/ul>\n<h2 data-start=\"2388\" data-end=\"2402\">Conclusion<\/h2>\n<p data-start=\"2404\" data-end=\"2519\">An imbalance in the immune system can cause implantation failure and recurrent miscarriages. Key to prevention are:<\/p>\n<ul data-start=\"2521\" data-end=\"2633\">\n<li data-start=\"2521\" data-end=\"2540\">\n<p data-start=\"2523\" data-end=\"2540\">Early diagnosis<\/p>\n<\/li>\n<li data-start=\"2541\" data-end=\"2567\">\n<p data-start=\"2543\" data-end=\"2567\">Personalized treatment<\/p>\n<\/li>\n<li data-start=\"2568\" data-end=\"2589\">\n<p data-start=\"2570\" data-end=\"2589\">Lifestyle changes<\/p>\n<\/li>\n<li data-start=\"2590\" data-end=\"2633\">\n<p data-start=\"2592\" data-end=\"2633\">Emotional support and stress management<\/p>\n<\/li>\n<\/ul>\n<p data-start=\"2635\" data-end=\"2795\" data-is-last-node=\"\" data-is-only-node=\"\">At Cl\u00ednica Fertia, we approach each case individually, optimizing the chances of achieving a successful pregnancy even in the presence of immune-related issues.<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<ol>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Knight JS, Branch DW, Ortel TL. Antiphospholipid syndrome: advances in diagnosis, pathogenesis, and management. BMJ. 2023 Feb 27;380:e069717. doi: 10.1136\/bmj-2021-069.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cuadrado-Torroglosa I, Garc\u00eda-Velasco JA, Alecsandru D. Maternal-Fetal Compatibility in Recurrent Pregnancy Loss. J Clin Med. 2024 Apr 19;13(8):2379. doi: 10.3390\/jcm13082379. PMID: 38673652; PMCID: PMC11051463.717. PMID: 36849186.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Casella G, Orfanotti G, Giacomantonio L, Bella CD, Crisafulli V, Villanacci V, Baldini V, Bassotti G. Celiac disease and obstetrical-gynecological contribution. Gastroenterol Hepatol Bed Bench. 2016 Fall;9(4):241-249. PMID: 27895849; PMCID: PMC5118848.<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Ta\u0144ska K, Gietka-Czernel M, Glinicki P, Kozakowski J. Thyroid autoimmunity and its negative impact on female fertility and maternal pregnancy outcomes. Front Endocrinol (Lausanne). 2023 Jan 11;13:1049665. doi: 10.3389\/fendo.2022.1049665. PMID: 36714589; PMCID: PMC9874701.<\/span><\/li>\n<\/ol>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>&nbsp; The Role of the Immune System in Fertility One of the main functions of our immune system (IS) is to differentiate between self and foreign structures. During pregnancy, the IS must tolerate the presence of an organism that is immunologically different from maternal tissue: the embryo. Additionally, the IS plays an active role in [&hellip;]<\/p>\n","protected":false},"author":5,"featured_media":24145,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-23896","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cat-fertility"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.9 (Yoast SEO v28.4) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Immunology and fertility: how the immune system influences pregnancy<\/title>\n<meta name=\"description\" content=\"Discover how the immune system can affect fertility and pregnancy. 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