{"id":73787,"date":"2022-07-19T09:00:00","date_gmt":"2022-07-19T00:00:00","guid":{"rendered":"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/"},"modified":"2024-03-12T10:55:10","modified_gmt":"2024-03-12T01:55:10","slug":"fetal-doubts","status":"publish","type":"post","link":"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en","title":{"rendered":"Why the foetus?\u3010supervised by doctor\u3011"},"content":{"rendered":"\n<div class=\"toc\">\n  <ul>\n    <li><a href=\"#c1\">Introduction<\/a><\/li>\n    <li><a href=\"#c2\">Fetal Respiration<\/a>\n      <ul>\n        <li><a href=\"#c2-1\">How does breathing occur in amniotic fluid?<\/a><\/li>\n        <li><a href=\"#c2-2\">Is it true that the fetus breathes through the gills?<\/a><\/li>\n        <li><a href=\"#c2-3\">Why does the fetus yawn?<\/a><\/li>\n        <li><a href=\"#c2-4\">Why doesn&#8217;t the fetus experience oxygen deprivation?<\/a><\/li>\n        <li><a href=\"#c2-5\">When does the fetus transition to lung breathing?<\/a><\/li>\n      <\/ul>\n    <\/li>\n    <li><a href=\"#c3\">Fetal Movement<\/a>\n      <ul>\n        <li><a href=\"#c3-1\">How does the fetus move inside the uterus?<\/a><\/li>\n        <li><a href=\"#c3-2\">Why does the fetus become breech?<\/a>\n          <ul>\n            <li><a href=\"#c3-2-1\">Risks of breech position<\/a><\/li>\n          <\/ul>\n        <\/li>\n      <\/ul>\n    <\/li>\n    <li><a href=\"#c4\">Fetal Development<\/a>\n      <ul>\n        <li><a href=\"#c4-1\">How do organs like the brain and eyes develop?<\/a><\/li>\n        <li><a href=\"#c4-2\">When does the skin develop?<\/a><\/li>\n        <li><a href=\"#c4-3\">How does the fetus excrete waste?<\/a><\/li>\n        <li><a href=\"#c4-4\">Is it true that the fetus has a tail?<\/a><\/li>\n        <li><a href=\"#c4-5\">How does the fetus receive nutrients without eating?<\/a><\/li>\n        <li><a href=\"#c4-6\">When does the circulation of blood begin?<\/a><\/li>\n      <\/ul>\n    <\/li>\n    <li><a href=\"#c5\">Mystery of Chromosomes<\/a>\n      <ul>\n        <li><a href=\"#c5-1\">What is a fertilized egg?<\/a><\/li>\n        <li><a href=\"#c5-2\">Why do twins occur?<\/a>\n          <ul>\n            <li><a href=\"#c5-2-1\">\u2460 When two eggs are released by chance and both are fertilized and implanted<\/a><\/li>\n            <li><a href=\"#c5-2-2\">\u2461 When a single fertilized egg splits into two before implantation, and each one implants separately<\/a><\/li>\n          <\/ul>\n        <\/li>\n        <li><a href=\"#c5-3\">Why do miscarriages happen?<\/a>\n          <ul>\n            <li><a href=\"#c5-3-1\">Why do chromosomal abnormalities occur?<\/a><\/li>\n            <li><a href=\"#c5-3-2\">NIPT (Non-Invasive Prenatal Testing) for chromosome examination<\/a><\/li>\n          <\/ul>\n        <\/li>\n      <\/ul>\n    <\/li>\n    <li><a href=\"#c6\">Conclusion<\/a><\/li>\n  <\/ul>\n  <button class=\"toc_more\">Open Table of Contents<\/button>\n<\/div>\n\n\n<p style=\"width:100%;max-width:300px;margin:0 auto;\"><a href=\"\/nipt\/\" class=\"content-bnr about\"><img decoding=\"async\" src=\"\/nipt\/wp-content\/themes\/hiro_nipt\/img\/banner\/nipt02pc.png\" alt=\"\u30c0\u30a6\u30f3\u75c7\u306f\u751f\u307e\u308c\u308b\u524d\u306b\u308f\u304b\u308a\u307e\u3059\u304b\uff1f\"><\/a> <\/p>\n\n\n\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\/fetal-doubts\/?lang=en\/#Introduction\" >Introduction<\/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\/fetal-doubts\/?lang=en\/#Fetal_Respiration\" >Fetal Respiration<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#How_does_breathing_occur_in_amniotic_fluid\" >How does breathing occur in amniotic fluid?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#Is_it_true_that_the_fetus_breathes_through_the_gills\" >Is it true that the fetus breathes through the gills?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#Why_does_the_fetus_yawn\" >Why does the fetus yawn?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#Why_dont_have_acid_deficiency\" >Why don&#8217;t have acid deficiency?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#Why_doesnt_the_fetus_experience_oxygen_deprivation\" >Why doesn&#8217;t the fetus experience oxygen deprivation?<\/a><\/li><\/ul><\/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\/fetal-doubts\/?lang=en\/#Fetal_Movement\" >Fetal Movement<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#How_does_the_fetus_move_inside_the_uterus\" >How does the fetus move inside the uterus?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#Why_does_the_fetus_become_breech\" >Why does the fetus become breech?<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#Risks_of_breech_position\" >Risks of breech position<\/a><\/li><\/ul><\/li><\/ul><\/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\/fetal-doubts\/?lang=en\/#Fetal_Development\" >Fetal Development<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#How_do_organs_like_the_brain_and_eyes_develop\" >How do organs like the brain and eyes develop?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#When_does_the_skin_develop\" >When does the skin develop?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#How_does_the_fetus_excrete_waste\" >How does the fetus excrete waste?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#Is_it_true_that_the_fetus_has_a_tail\" >Is it true that the fetus has a tail?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#How_does_the_fetus_receive_nutrients_without_eating\" >How does the fetus receive nutrients without eating?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#When_does_the_circulation_of_blood_begin\" >When does the circulation of blood begin?<\/a><\/li><\/ul><\/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\/fetal-doubts\/?lang=en\/#Mystery_of_Chromosomes\" >Mystery of Chromosomes<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#What_is_a_fertilized_egg\" >What is a fertilized egg?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#Why_do_twins_occur\" >Why do twins occur?<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#%E2%91%A0When_two_eggs_are_released_by_chance_and_both_are_fertilized_and_implanted\" >\u2460When two eggs are released by chance and both are fertilized and implanted<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#%E2%91%A1When_a_single_fertilized_egg_splits_into_two_before_implantation_and_each_one_implants_separately\" >\u2461When a single fertilized egg splits into two before implantation, and each one implants separately<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#Why_do_miscarriages_happen\" >Why do miscarriages happen?<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#Why_do_chromosomal_abnormalities_occur\" >Why do chromosomal abnormalities occur?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#NIPT_Non-Invasive_Prenatal_Testing_for_chromosome_examination\" >NIPT (Non-Invasive Prenatal Testing) for chromosome examination<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"c1\"><span class=\"ez-toc-section\" id=\"Introduction\"><\/span>Introduction<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Many things can be unsettling during pregnancy, and you may wonder what the baby in your tummy is doing, how it is growing and why this is happening. In this article, we will explain the wonders of the foetus.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"c2\"><span class=\"ez-toc-section\" id=\"Fetal_Respiration\"><\/span>Fetal Respiration<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>The baby receives oxygen from the mother through the placenta and umbilical cord, and does not breathe through the lungs as we do now. However, from around 28 weeks&#8217; gestation, the baby drinks amniotic fluid, stores it in the lungs, expands it and then expels it again. Drinking amniotic fluid is a way of practising breathing. The first time the baby breathes from the lungs is at the moment of birth.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c2-1\"><span class=\"ez-toc-section\" id=\"How_does_breathing_occur_in_amniotic_fluid\"><\/span>How does breathing occur in amniotic fluid?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The baby in the mother&#8217;s tummy floats in water called amniotic fluid. If it tries to breathe, it drinks the amniotic fluid and drowns. The baby receives the oxygen it needs through the umbilical cord and passes on the carbon dioxide it no longer needs.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c2-2\"><span class=\"ez-toc-section\" id=\"Is_it_true_that_the_fetus_breathes_through_the_gills\"><\/span>Is it true that the fetus breathes through the gills?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Babies in early pregnancy look like fish with gills and a tail. With gills and a tail, you would think that the foetus is breathing through its gills, but in fact the foetus does not breathe through its gills in the mother&#8217;s womb. Eventually, the gills are removed, lungs are formed and the baby approaches human shape.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c2-3\"><span class=\"ez-toc-section\" id=\"Why_does_the_fetus_yawn\"><\/span>Why does the fetus yawn?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>When your baby is about 10-15 weeks, he or she will start yawning and hiccupping. This is in preparation for the baby to start breathing after birth. After birth, the baby will have to breathe on its own for a long time, so practice is essential.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c2-4\"><span class=\"ez-toc-section\" id=\"Why_dont_have_acid_deficiency\"><\/span>Why don&#8217;t have acid deficiency?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>You may wonder why baby do not have acid deficiency (lack of oxygen) if not breathing. Babies receive oxygen and nutrients through the umbilical cord, so unless there is an abnormality on the mother&#8217;s side, they will not suffer from acid deficiency. However, because they cannot take in oxygen on their own, their blood is thinner than it is outside and they have the ability to carry limited oxygen throughout the body more efficiently. It has been shown that brain cells are not affected even in babies who have been in a state of suspended animation for 15 minutes due to birth problems.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c2-5\"><span class=\"ez-toc-section\" id=\"Why_doesnt_the_fetus_experience_oxygen_deprivation\"><\/span>Why doesn&#8217;t the fetus experience oxygen deprivation?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The first thing the baby does when it emerges from the womb is to let out an oughting sound. This is actually the first sound of lung breathing. From birth, the respiratory movement of the baby and us as adults is to take oxygen into the blood as air and to exhale carbon dioxide.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"600\" height=\"400\" src=\"\/nipt\/wp-content\/uploads\/2022\/05\/newborn-apnea01.jpg\" alt=\"\u80ce\u5150\u306e\u547c\u5438\" class=\"wp-image-30037\"\/><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\" id=\"c3\"><span class=\"ez-toc-section\" id=\"Fetal_Movement\"><\/span>Fetal Movement<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>It is estimated that the mother feels the foetal movements at 15-20 weeks of pregnancy. However, the baby in the tummy has been moving and turning its body around since about 8 weeks&#8217; gestation. From about 10-20 weeks&#8217; gestation, the baby starts yawning, mouthing and other exercises necessary for it to survive after birth.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c3-1\"><span class=\"ez-toc-section\" id=\"How_does_the_fetus_move_inside_the_uterus\"><\/span>How does the fetus move inside the uterus?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Babies floating in amniotic fluid are active, swimming, bending and stretching their legs. Gradually, they are also able to make fine movements such as sucking their fingers. As their brain development becomes more active, they are able to control their movements.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c3-2\"><span class=\"ez-toc-section\" id=\"Why_does_the_fetus_become_breech\"><\/span>Why does the fetus become breech?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>A baby in the tummy with its head facing upwards is called breech (pelvic position). Until around the mid-term of pregnancy, there is room in the womb for the baby to turn around. Therefore, the time when you are told that you have a breech baby is around the end of pregnancy. Although there is no specific cause for why most babies are breech and it is difficult to predict when a baby will be breech, the following are considered to be at risk of breech birth.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"c3-2-1\"><span class=\"ez-toc-section\" id=\"Risks_of_breech_position\"><\/span>Risks of breech position<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Uterine fibroids (uterine myoma)<\/li>\n\n\n\n<li>Congenital abnormalities of uterine morphology<\/li>\n\n\n\n<li>Placenta previa (placenta previa)<\/li>\n\n\n\n<li>Under or over amniotic fluid<\/li>\n\n\n\n<li>Multiple pregnancies (more than two or three pregnancies)<\/li>\n\n\n\n<li>Intrauterine foetal growth retardation<\/li>\n\n\n\n<li>Baby morphological abnormalities (e.g. hydrocephalus, anencephaly, sacrococcygeal teratoma)<\/li>\n\n\n\n<li>Last pregnancy was a caesarean section<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"c4\"><span class=\"ez-toc-section\" id=\"Fetal_Development\"><\/span>Fetal Development<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A new life that begins as a fertilised egg goes through a number of stages of development. The fertilised egg develops into a blastocyst, a foetus and a foetus.<\/p>\n\n\n\n    <a href=\"\/nipt\/from-pregnancy-to-childbirth\/\" class=\"blog-card\">\n      <div class=\"blog-card-content\">\n          <div class=\"blog-card-title\">\u598a\u5a20\u304b\u3089\u51fa\u7523\u307e\u3067\u80ce\u5150\u306e\u6210\u9577\u904e\u7a0b\u3068NIPT(\u65b0\u578b\u51fa\u751f\u524d\u8a3a\u65ad)\u306b\u3064\u3044\u3066\u3010\u533b\u5e2b\u76e3\u4fee\u3011 <\/div>\n          <div class=\"blog-card-excerpt\">\u598a\u5a20\u3057\u3066\u304b\u3089\u51fa\u7523\u307e\u3067\u80ce\u5150\u306e\u8eab\u4f53\u306f\u65e5\u3005\u5909\u5316\u3057\u3066\u3044\u304d\u307e\u3059\u3002\u307b\u3093\u306e1mm\u306b\u3082\u6e80\u305f\u306a\u304b\u3063\u305f\u53d7\u7cbe\u5375\u304c\u3001\u7d043000g\u306e\u8d64\u3061\u3083\u3093\u306b\u6210\u9577\u3059\u308b\u307e\u3067\u306e\u598a\u5a20\u9031\u6570\u3068...<\/div>\n      <\/div>\n    <\/a>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c4-1\"><span class=\"ez-toc-section\" id=\"How_do_organs_like_the_brain_and_eyes_develop\"><\/span>How do organs like the brain and eyes develop?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>A single cell, the fertilised egg, is just 0.1 mm in size and invisible to the eye, but in about 10 months or so it grows to an astonishing 3 kg foetus, which is called the baby&#8217;s organogenesis period from 4 to 10 weeks, when organs and tissues such as the brain, eyes and other nerves, heart, stomach, intestines and limbs are formed.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c4-2\"><span class=\"ez-toc-section\" id=\"When_does_the_skin_develop\"><\/span>When does the skin develop?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Skin tissue begins to be formed at around 10 weeks&#8217; gestation, but it takes around 34 weeks for the skin to fully resemble that of an adult. Around 18 weeks&#8217; gestation, hair also begins to grow on the head and a substance called fetal fat, which protects the foetus&#8217; skin, is produced. The amount of fetal fat varies from foetus to foetus, but by the time of delivery it will cover the baby&#8217;s entire body.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c4-3\"><span class=\"ez-toc-section\" id=\"How_does_the_fetus_excrete_waste\"><\/span>How does the fetus excrete waste?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>In early pregnancy, amniotic fluid is made up of the egg membrane that surrounds the baby and blood that has seeped out of the baby&#8217;s skin. As the baby grows bigger in mid-pregnancy, the digestive tract and kidneys begin to function and the baby itself drinks the amniotic fluid around it and passes it out as wee. The baby&#8217;s waste is passed to the mother through the umbilical cord, so pee is not dirty at all.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c4-4\"><span class=\"ez-toc-section\" id=\"Is_it_true_that_the_fetus_has_a_tail\"><\/span>Is it true that the fetus has a tail?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Babies up to seven weeks&#8217; gestation are called embryos (tigers). At this time, the baby has a tail and gills and looks like a seahorse. You may wonder why this becomes a human being.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c4-5\"><span class=\"ez-toc-section\" id=\"How_does_the_fetus_receive_nutrients_without_eating\"><\/span>How does the fetus receive nutrients without eating?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>The reason why a foetus that does not eat grows is because the placenta, which is attached to the wall of the uterus at the end of the umbilical cord, delivers nutrients and oxygen from the mother&#8217;s blood into the baby&#8217;s blood. It also passes unwanted substances to the mother&#8217;s blood. Therefore, the baby does not need to breathe or eat.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c4-6\"><span class=\"ez-toc-section\" id=\"When_does_the_circulation_of_blood_begin\"><\/span>When does the circulation of blood begin?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>At around 5 weeks&#8217; gestation, the organs that form the basis of the organs and the umbilical cord are formed. The heart is also formed and blood is pumped to the baby&#8217;s body organs. Around 6 weeks&#8217; gestation, the baby&#8217;s heart can be seen on ultrasound.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"c5\"><span class=\"ez-toc-section\" id=\"Mystery_of_Chromosomes\"><\/span>Mystery of Chromosomes<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>A sperm and an egg combine and their respective chromosomes fit together to form a fertilised egg. Chromosomes contain genetic information inherited from both parents. Humans have 46 chromosomes (23 pairs), divided into 44 (22 pairs) autosomes and 2 (1 pair) sex chromosomes. Chromosomes cannot be treated, even if a person is found to have a disease with a chromosomal abnormality.<\/p>\n\n\n\n    <a href=\"\/nipt\/gene\/\" class=\"blog-card\">\n      <div class=\"blog-card-content\">\n          <div class=\"blog-card-title\">\u67d3\u8272\u4f53\u3084\u907a\u4f1d\u5b50\u3068\u306f\uff1fNIPT(\u65b0\u578b\u51fa\u751f\u524d\u8a3a\u65ad)\u3092\u6d3b\u7528\u3059\u308c\u3070\u3001\u907a\u4f1d\u5b50\u30ec\u30d9\u30eb\u3067\u80ce\u5150\u306e\u72b6\u614b\u304c\u308f\u304b\u308b\u3010\u533b\u5e2b\u76e3\u4fee\u3011 <\/div>\n          <div class=\"blog-card-excerpt\">\u3053\u306e\u8a18\u4e8b\u3067\u306f\u30d2\u30c8\u3092\u5f62\u4f5c\u308b\u67d3\u8272\u4f53\u3084\u907a\u4f1d\u5b50\u306a\u3069\u306b\u3064\u3044\u3066\u3092\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002NIPT\uff08\u65b0\u578b\u51fa\u751f\u524d\u8a3a\u65ad\uff09\u306b\u3064\u3044\u3066\u3082\u89e6\u308c\u3066\u304a\u308a\u3001\u3053\u308c\u3092\u6d3b\u7528\u3059\u308b\u3053\u3068\u3067\u80ce...<\/div>\n      <\/div>\n    <\/a>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c5-1\"><span class=\"ez-toc-section\" id=\"What_is_a_fertilized_egg\"><\/span>What is a fertilized egg?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>A fertilised egg is the result of the meeting and fusion of a sperm and an egg. The sperm and egg become a fertilised egg at the end of the fallopian tube and move down the fallopian tube towards the uterus through repeated cell division. The fertilised egg develops into a blastocyst, embryo and foetus.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"c5-2\"><span class=\"ez-toc-section\" id=\"Why_do_twins_occur\"><\/span>Why do twins occur?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>There are two types of twins in natural pregnancies.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"c5-2-1\"><span class=\"ez-toc-section\" id=\"%E2%91%A0When_two_eggs_are_released_by_chance_and_both_are_fertilized_and_implanted\"><\/span><strong>\u2460<\/strong>When two eggs are released by chance and both are fertilized and implanted<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>It means that they are derived from two identical twin eggs. They inherit their parents&#8217; genes, but not exactly the same genetic sequence between the two. The sexes may be different and the faces may not look very similar.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"c5-2-2\"><span class=\"ez-toc-section\" id=\"%E2%91%A1When_a_single_fertilized_egg_splits_into_two_before_implantation_and_each_one_implants_separately\"><\/span><strong>\u2461<\/strong>When a single fertilized egg splits into two before implantation, and each one implants separately<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>They are called identical twins: because they originate from one egg, their genes are exactly the same. Therefore, the sexes are always the same and they often have the same face and voice.<\/p>\n\n\n\n<p>The probability of having twins is higher with IVF than with natural conception. This is because in the case of IVF, two fertilised eggs may be returned at the doctor&#8217;s discretion. If both fertilised eggs are implanted, the twins will be fraternal twins. Identical twins cannot be avoided with IVF, nor can they be intentionally made identical.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img decoding=\"async\" width=\"600\" height=\"400\" src=\"\/nipt\/wp-content\/uploads\/2022\/05\/img-baby-boy-and-girl01.jpg\" alt=\"\u53cc\u5b50\u306e\u8b0e\" class=\"wp-image-28609\"\/><\/figure><\/div>\n\n\n<h3 class=\"wp-block-heading\" id=\"c5-3\"><span class=\"ez-toc-section\" id=\"Why_do_miscarriages_happen\"><\/span>Why do miscarriages happen?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>15-20% of pregnancies result in miscarriage. About 85% of miscarriages occur before 12 weeks of pregnancy. It is estimated that one in three women will have experienced a miscarriage, and many women do. Most miscarriages that occur before about 11 weeks&#8217; gestation are due to causes on the part of the baby (genetic disorders, congenital abnormalities). Therefore, in most cases, the moment of conception determines whether the miscarriage is a miscarriage or not. <a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/early-nipt-august-only\/\">Early<\/a> miscarriages are unlikely to be caused by drinking, smoking, taking medication, work or exercise without being aware of the pregnancy.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"c5-3-1\"><span class=\"ez-toc-section\" id=\"Why_do_chromosomal_abnormalities_occur\"><\/span>Why do chromosomal abnormalities occur?<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p>It is not known exactly why chromosome number abnormalities occur.<\/p>\n\n\n\n<p>It is thought that chromosome aberrations can occur for a variety of reasons, including genetic, disease-related or accidental, but it is known that the probability of chromosome aberrations increasing with age.<\/p>\n\n\n\n    <a href=\"\/nipt\/about-down-syndrome\/\" class=\"blog-card\">\n      <div class=\"blog-card-content\">\n          <div class=\"blog-card-title\">\u30c0\u30a6\u30f3\u75c7\uff0821\u30c8\u30ea\u30bd\u30df\u30fc\uff09\u3068\u306f\uff1f\u539f\u56e0\u3084\u7279\u5fb4\u30fb\u691c\u67fb\u65b9\u6cd5\u3092\u89e3\u8aac <\/div>\n          <div class=\"blog-card-excerpt\">\u30c0\u30a6\u30f3\u75c7\uff0821\u30c8\u30ea\u30bd\u30df\u30fc\uff09\u3068\u306f\uff1f\u539f\u56e0\u3084\u7279\u5fb4\u3001\u907a\u4f1d\u306e\u53ef\u80fd\u6027\u3001\u9ad8\u9f62\u51fa\u7523\u3068\u306e\u95a2\u4fc2\u3001\u75c7\u72b6\u3001\u652f\u63f4\u5236\u5ea6\u306a\u3069\u3092\u8a73\u3057\u304f\u89e3\u8aac\u3002\u598a\u5a20\u4e2d\u306e\u4e0d\u5b89\u306b\u5bc4\u308a\u6dfb\u3046\u60c5\u5831\u3092\u63d0\u4f9b...<\/div>\n      <\/div>\n    <\/a>\n\n\n\n<h4 class=\"wp-block-heading\" id=\"c5-3-2\"><span class=\"ez-toc-section\" id=\"NIPT_Non-Invasive_Prenatal_Testing_for_chromosome_examination\"><\/span>NIPT (Non-Invasive Prenatal Testing) for chromosome examination<span class=\"ez-toc-section-end\"><\/span><\/h4>\n\n\n\n<p><a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/nipt\/\" data-type=\"URL\" data-id=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/nipt\/\">NIPT<\/a>, also known as non-invasive prenatal genetic testing\/non-invasive prenatal genetic testing, is a screening test that uses maternal blood alone to check the baby&#8217;s risk of congenital diseases due to chromosomal abnormalities. It is said to be capable of detecting a positive risk of Down syndrome (21 trisomy), Edwards syndrome (18 trisomy) and Patau syndrome (13 trisomy) with a high accuracy of 99.9%.<\/p>\n\n\n\n<p>Hiro Clinic <a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/\">NIPT<\/a> can be performed as soon as the pregnancy is confirmed by an ultrasound scan. The test only requires a blood sample to be taken from the mother&#8217;s arm, so there is almost no direct damage to the baby.<\/p>\n\n\n\n    <a href=\"\/nipt\/nipt\/nipt\/\" class=\"blog-card\">\n      <div class=\"blog-card-content\">\n          <div class=\"blog-card-title\">\u77e5\u7684\u969c\u304c\u3044\u304c\u308f\u304b\u308bNIPT\u3068\u306f\uff08NIPT\u306e\u57fa\u672c\uff09 <\/div>\n          <div class=\"blog-card-excerpt\">\u30d2\u30ed\u30af\u30ea\u30cb\u30c3\u30af\u3067\u884c\u3063\u3066\u3044\u308bNIPT\u306e\u307e\u3068\u3081\u3067\u3059\u3002\u30d2\u30ed\u30af\u30ea\u30cb\u30c3\u30af\u306eNIPT\u3067\u306f\u77e5\u7684\u969c\u5bb3\u30fb\u767a\u9054\u969c\u5bb3\u3092\u4f34\u3046\u591a\u6570\u306e\u75be\u60a3\u3092\u51fa\u751f\u524d\u306b\u691c\u51fa\u3059\u308b\u3053\u3068\u304c\u53ef\u80fd\u3067...<\/div>\n      <\/div>\n    <\/a>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"c6\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>There are many mysteries about the foetus that medicine has yet to fully understand, but advances in medical technology have helped to unravel many of them, and one of the best things for pregnant women is being able to see their baby&#8217;s condition through 4D echoes, for example. Why? There may be many things that make you wonder and feel uneasy, but let&#8217;s resolve any worries you may have and enjoy a peaceful maternity life with peace of mind.<\/p>\n\n\n\n<div class=\"wp-block-group references\"><div class=\"wp-block-group__inner-container is-layout-flow wp-block-group-is-layout-flow\">\n<p>\u3010References\u3011<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a rel=\"noopener\" href=\"https:\/\/www.jaog.or.jp\/\" target=\"_blank\">Japan Society of Obstetricians and Gynaecologists<\/a><\/li>\n\n\n\n<li><a rel=\"noopener\" href=\"https:\/\/www.msdmanuals.com\/ja-jp\/\" target=\"_blank\">Msd Manual<\/a><\/li>\n<\/ul>\n<\/div><\/div>\n","protected":false},"excerpt":{"rendered":"Introduction Fetal R&#8230;\n <a href=\"https:\/\/www.hiro-clinic.or.jp\/nipt\/fetal-doubts\/?lang=en\">\u7d9a\u304d\u3092\u8aad\u3080<\/a>","protected":false},"author":13,"featured_media":25390,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[206],"tags":[],"class_list":["post-73787","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pregnancy-questions"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/posts\/73787","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\/13"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/comments?post=73787"}],"version-history":[{"count":3,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/posts\/73787\/revisions"}],"predecessor-version":[{"id":73981,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/posts\/73787\/revisions\/73981"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/media\/25390"}],"wp:attachment":[{"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/media?parent=73787"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/categories?post=73787"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hiro-clinic.or.jp\/nipt\/wp-json\/wp\/v2\/tags?post=73787"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}