{"id":116676,"date":"2025-09-26T10:29:18","date_gmt":"2025-09-26T01:29:18","guid":{"rendered":"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/"},"modified":"2025-09-26T10:37:15","modified_gmt":"2025-09-26T01:37:15","slug":"chromosome-microdeletion-intellectual-disability","status":"publish","type":"post","link":"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en","title":{"rendered":"Did You Know That Small Chromosomal Abnormalities Can Cause Intellectual Disability?"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#1_Introduction_The_Relationship_Between_Intellectual_Disability_and_Chromosomal_Abnormalities\" >1. Introduction: The Relationship Between Intellectual Disability and Chromosomal Abnormalities<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#2_What_Are_Chromosomal_Abnormalities\" >2. What Are Chromosomal Abnormalities?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#3_The_Connection_of_Microdeletions_Duplications_to_Intellectual_Disability\" >3. The Connection of Microdeletions \/ Duplications to Intellectual Disability<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#4_What_Chromosomal_Abnormalities_Can_Be_Detected_by_NIPT\" >4. What Chromosomal Abnormalities Can Be Detected by NIPT<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#5_Why_Even_Small_Abnormalities_Can_Have_Major_Impact\" >5. Why Even Small Abnormalities Can Have Major Impact<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#6_The_Advantages_of_Knowing_Before_Birth\" >6. The Advantages of Knowing Before Birth<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#7_Limitations_and_Precautions_of_NIPT\" >7. Limitations and Precautions of NIPT<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#8_Decision%E2%80%91Making_Processes_for_Families_and_Medical_Providers\" >8. Decision\u2011Making Processes for Families and Medical Providers<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#9_Social_and_Ethical_Challenges\" >9. Social and Ethical Challenges<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#10_Postnatal_Support_That_Can_Be_Utilized\" >10. Postnatal Support That Can Be Utilized<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#11_Future_Outlook\" >11. Future Outlook<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#12_Impact_of_Early_Detection_of_Chromosomal_Abnormalities_on_Families\" >12. Impact of Early Detection of Chromosomal Abnormalities on Families<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#13_Role_of_Genetic_Counseling\" >13. Role of Genetic Counseling<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#14_Social_and_Ethical_Considerations\" >14. Social and Ethical Considerations<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#15_Concrete_Examples_of_Postnatal_Medical_Therapeutic_Care\" >15. Concrete Examples of Postnatal Medical &amp; Therapeutic Care<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#16_Recent_Research_Trends\" >16. Recent Research Trends<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#17_Points_Families_Should_Be_Aware_of_in_Advance\" >17. Points Families Should Be Aware of in Advance<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#Conclusion_Understanding_Small_Chromosomal_Abnormalities_Can_Change_the_Future\" >Conclusion: Understanding Small Chromosomal Abnormalities Can Change the Future<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\/#References_Evidence\" >References (Evidence)<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"1_Introduction_The_Relationship_Between_Intellectual_Disability_and_Chromosomal_Abnormalities\"><\/span>1. Introduction: The Relationship Between Intellectual Disability and Chromosomal Abnormalities<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Intellectual disability refers to a state in which the intelligence quotient (IQ) is below 70 and support is needed for daily life.<br>There are many causes, but congenital chromosomal abnormalities account for a significant portion.<br>In particular, in recent years it has become clear that \u201cmicrodeletions \/ microduplications\u201d (small missing or extra chromosome segments) can lead to intellectual disability or developmental disorders ranging from mild to severe.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"2_What_Are_Chromosomal_Abnormalities\"><\/span>2. What Are Chromosomal Abnormalities?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Chromosomal abnormalities are states in which the number or structure of chromosomes is altered. They are broadly classified into:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Numerical abnormalities<\/strong>: an abnormal number of chromosomes (e.g., Down syndrome = trisomy 21)<\/li>\n\n\n\n<li><strong>Structural abnormalities<\/strong>: parts of chromosomes are missing, duplicated, inverted, or translocated<\/li>\n<\/ul>\n\n\n\n<p>Among structural abnormalities, extremely small deletions or duplications invisible to the naked eye are called <strong>microdeletions \/ microduplications<\/strong>, and these are difficult to detect with conventional chromosomal tests.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"3_The_Connection_of_Microdeletions_Duplications_to_Intellectual_Disability\"><\/span>3. The Connection of Microdeletions \/ Duplications to Intellectual Disability<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Recent genetic research has found that certain microdeletions\/duplications are strongly associated with intellectual disability:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/1p-36-deletion-syndrome\/\">1p36<\/a> deletion syndrome<\/li>\n\n\n\n<li>22q11.2 deletion syndrome (DiGeorge syndrome)<\/li>\n\n\n\n<li>7q11.23 deletion syndrome (Williams syndrome)<\/li>\n\n\n\n<li>Abnormalities in the 15q11\u201113 region (Prader\u2013Willi syndrome \/ Angelman syndrome)<\/li>\n<\/ul>\n\n\n\n<p>These can manifest in a spectrum from mild learning difficulties to severe intellectual disability, developmental disorders, or behavioral abnormalities, and are increasingly considered as part of prenatal diagnostic targets.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"4_What_Chromosomal_Abnormalities_Can_Be_Detected_by_NIPT\"><\/span>4. What Chromosomal Abnormalities Can Be Detected by NIPT<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Traditional <a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/\">NIPT<\/a> (non\u2011invasive prenatal testing) was focused on trisomies 21, 18, and 13, but in recent years screening has expanded to include whole\u2011chromosome testing and microdeletion syndromes.<br>By analyzing fetal DNA, the following information may be obtained before birth:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Developmental risk due to microdeletions \/ duplications<\/li>\n\n\n\n<li>Risk of congenital anomalies from numerical abnormalities<\/li>\n\n\n\n<li>Predictions of medical\/therapeutic support needs after birth<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"5_Why_Even_Small_Abnormalities_Can_Have_Major_Impact\"><\/span>5. Why Even Small Abnormalities Can Have Major Impact<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Microdeletions or duplications may involve only a few million base pairs (Mb) of chromosome material, yet these regions often contain genes critical for brain development.<br>For example, in 22q11.2 deletion syndrome, along with cardiac malformations or immune abnormalities, mild to moderate intellectual disability and psychiatric disorder risk are known.<br>Thus, even extremely small chromosomal anomalies can exert significant influence over neurodevelopment.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"6_The_Advantages_of_Knowing_Before_Birth\"><\/span>6. The Advantages of Knowing Before Birth<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>If small chromosomal abnormalities can be detected before birth, there are several benefits:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ability to arrange medical care immediately after birth<\/li>\n\n\n\n<li>Safe delivery in a facility with NICU (neonatal intensive care unit)<\/li>\n\n\n\n<li><a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/early-nipt-august-only\/\">Early<\/a> initiation of therapeutic interventions and rehabilitation, enhancing developmental potential<\/li>\n\n\n\n<li>Time for the family to prepare psychologically<\/li>\n\n\n\n<li>Having this information helps reduce postnatal chaos and allows the child to get the best possible start<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"7_Limitations_and_Precautions_of_NIPT\"><\/span>7. Limitations and Precautions of NIPT<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Although <a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/\">NIPT<\/a> is a convenient test, the following points must be noted:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>It is a screening test, not a definitive diagnosis<\/li>\n\n\n\n<li>If results are positive, confirmation via amniocentesis or chorionic villus sampling is required<\/li>\n\n\n\n<li>False positives or false negatives can rarely occur<\/li>\n\n\n\n<li>Individual acceptance of results varies; psychological support may be needed<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"8_Decision%E2%80%91Making_Processes_for_Families_and_Medical_Providers\"><\/span>8. Decision\u2011Making Processes for Families and Medical Providers<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>When prenatal testing suggests a chromosomal abnormality, families usually undertake the following steps to make decisions:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Accurately understand the test results<\/li>\n\n\n\n<li>Decide whether to undergo confirmatory diagnostic testing (e.g. amniocentesis)<\/li>\n\n\n\n<li>Prepare for postnatal life, medical care, and education<br>Throughout this process, genetic counseling becomes highly important. Experts help interpret the meaning of results and alleviate the psychological burden on the family.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"9_Social_and_Ethical_Challenges\"><\/span>9. Social and Ethical Challenges<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>While early detection of chromosomal abnormalities is a medical advancement, it also brings the following challenges:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Concern about societal pressure that \u201cchildren with disabilities should not be born\u201d<\/li>\n\n\n\n<li>Inequalities in test access due to geographic or economic disparity<\/li>\n\n\n\n<li>Psychological stress from information overload<br>Therefore, prenatal diagnosis should be considered not just as a source of medical information but in conjunction with a social support system.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"10_Postnatal_Support_That_Can_Be_Utilized\"><\/span>10. Postnatal Support That Can Be Utilized<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Even when small chromosomal abnormalities exist, proper medical care and support can significantly affect a child\u2019s development:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/early-nipt-august-only\/\">Early<\/a> intervention programs (physical therapy, occupational therapy, speech therapy)<\/li>\n\n\n\n<li>Use of regional facilities and day programs for children with disabilities<\/li>\n\n\n\n<li>Comprehensive support through coordination of medical, educational, and welfare services<br>If risks are known prenatally, these supports can be initiated more smoothly and earlier.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"11_Future_Outlook\"><\/span>11. Future Outlook<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>With advances in next\u2011generation sequencing technology, it will become possible to detect even smaller chromosomal abnormalities or gene\u2011level changes.<br>However, challenges in interpreting results and achieving societal acceptance remain, so a support system integrating medicine, ethics, and welfare is needed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"12_Impact_of_Early_Detection_of_Chromosomal_Abnormalities_on_Families\"><\/span>12. Impact of Early Detection of Chromosomal Abnormalities on Families<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Knowing of possible chromosomal abnormalities before birth has not only medical advantages, but also significant effects on family psychology and life planning:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Psychological readiness<\/strong>: obtaining information beforehand can reduce the shock of being told unexpectedly after birth<\/li>\n\n\n\n<li><strong>Planning birth and child rearing<\/strong>: choosing the right obstetric facility and preparing neonatal medical care becomes possible<\/li>\n\n\n\n<li><strong><a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/early-nipt-august-only\/\">Early<\/a> utilization of social resources<\/strong>: learning in advance about support systems for children with disabilities, medical expense subsidies, and preparing application procedures<br>Thus, early detection is directly linked to improving not only the child\u2019s but also the family\u2019s quality of life.<\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"640\" height=\"427\" src=\"\/nipt\/wp-content\/uploads\/2025\/09\/3388724_s.webp\" alt=\"\u598a\u5a66\" class=\"wp-image-116668\"\/><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"13_Role_of_Genetic_Counseling\"><\/span>13. Role of Genetic Counseling<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>In prenatal diagnostics, genetic counseling plays a key role. Genetic counselors and physicians provide the following support:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Precise explanation of test methods and results<\/li>\n\n\n\n<li>Interpretation of medical significance and possible manifestations<\/li>\n\n\n\n<li>Support in decision\u2011making aligned with the family\u2019s values<\/li>\n\n\n\n<li>Guidance on available social and therapeutic support systems<br>With this process, the family can sort through information and calmly decide on the next step.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"14_Social_and_Ethical_Considerations\"><\/span>14. Social and Ethical Considerations<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>As early detection of micro chromosomal abnormalities becomes more widespread, the following issues emerge:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>How to address the \u201cpressure of choice\u201d \u2014 whether the detection of an abnormality becomes a psychological burden regarding continuation of the pregnancy?<\/li>\n\n\n\n<li>How to correct information inequality \u2014 differences in access to tests and counseling between urban vs rural areas, among different economic strata<\/li>\n\n\n\n<li>How to improve societal acceptance and support for persons with disabilities?<br>Medical progress must proceed in tandem with support systems and ethical reflection.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"15_Concrete_Examples_of_Postnatal_Medical_Therapeutic_Care\"><\/span>15. Concrete Examples of Postnatal Medical &amp; Therapeutic Care<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>For children with chromosomal abnormalities, prompt postnatal medical and therapeutic support is extremely important:<\/p>\n\n\n\n<p><strong>Medical side<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/early-nipt-august-only\/\">Early<\/a> management of congenital heart disease or respiratory problems<\/li>\n\n\n\n<li>Regular growth and developmental follow\u2011up<\/li>\n<\/ul>\n\n\n\n<p><strong>Therapeutic side<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/early-nipt-august-only\/\">Early<\/a> initiation of physical therapy, occupational therapy, speech therapy<\/li>\n\n\n\n<li>Introduction of developmental support programs at home<\/li>\n<\/ul>\n\n\n\n<p><strong>Education \/ Welfare side<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use of regional disability day programs and special support education<\/li>\n\n\n\n<li>An integrated support system combining medical, welfare, and educational services<\/li>\n<\/ul>\n\n\n\n<p>If chromosomal anomalies are known before birth, these supports can be activated in a smoother, more coordinated way.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"16_Recent_Research_Trends\"><\/span>16. Recent Research Trends<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Research on chromosomal abnormalities is rapidly evolving:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The proliferation of whole\u2011chromosome <a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/\">NIPT<\/a> enables detection not only of numerical abnormalities but also microdeletions \/ duplications<\/li>\n\n\n\n<li>Application of microarray analysis and NGS (next\u2011generation sequencing)<br>\u2192 Can detect abnormalities at the scale of hundreds of thousands to millions of base pairs with high precision<\/li>\n\n\n\n<li>Integration with genomic medicine<br>\u2192 Prenatal diagnosis and postnatal precision medical support are gradually connecting<br>In the future, combining prenatal diagnosis with postnatal genomic medicine is expected to make developmental support for children more efficient.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"17_Points_Families_Should_Be_Aware_of_in_Advance\"><\/span>17. Points Families Should Be Aware of in Advance<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Before undergoing <a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/\">NIPT<\/a> or chromosomal testing, it is advisable for families to discuss the following:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>What is the purpose of taking the test?<\/li>\n\n\n\n<li>What will we do if the result is positive?<\/li>\n\n\n\n<li>What kind of support do we hope for after birth?<\/li>\n<\/ul>\n\n\n\n<p>Having this preparation means that when test results arrive, the family is not thrown into confusion but can act proactively and thoughtfully.<\/p>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion_Understanding_Small_Chromosomal_Abnormalities_Can_Change_the_Future\"><\/span><strong>Conclusion: Understanding Small Chromosomal Abnormalities Can Change the Future<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chromosomal abnormalities are one of the main causes of intellectual and developmental disabilities<\/li>\n\n\n\n<li>Even microdeletions \/ duplications can have significant influence on neurodevelopment<\/li>\n\n\n\n<li>Prenatal tests such as <a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/\">NIPT<\/a> can help detect risks early, enabling earlier medical, therapeutic, and family support<\/li>\n\n\n\n<li>While considering medical advances, it\u2019s equally important to be aware of the social and ethical implications and support structures<\/li>\n\n\n\n<li>Correct comprehension of chromosomal abnormalities is the first step toward a more secure, comforting future for the child and family<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"References_Evidence\"><\/span><strong>References (Evidence)<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Japan Society of Obstetrics and Gynecology: \u201cGuidelines on Prenatal Diagnosis\u201d<br>Shaffer LG et al., <em>American Journal of Human Genetics<\/em>, 2007; 80: 605\u2011616<br>Miller DT et al., <em>Genetics in Medicine<\/em>, 2010; 12(11): 742\u2011755<br>Xu Y et al., <em>Prenatal Diagnosis<\/em>, 2020; 40(7): 869\u2011879<br>Wilson KL et al., <em>Genetics in Medicine<\/em>, 2021; 23: 1222\u20111231<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"1. Introduction: The&#8230;\n <a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/chromosome-microdeletion-intellectual-disability\/?lang=en\">\u7d9a\u304d\u3092\u8aad\u3080<\/a>","protected":false},"author":122,"featured_media":116666,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[97],"tags":[],"class_list":["post-116676","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uncategorized"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/posts\/116676","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/users\/122"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/comments?post=116676"}],"version-history":[{"count":2,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/posts\/116676\/revisions"}],"predecessor-version":[{"id":116683,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/posts\/116676\/revisions\/116683"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/media\/116666"}],"wp:attachment":[{"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/media?parent=116676"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/categories?post=116676"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/tags?post=116676"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}