{"id":60614,"date":"2015-06-10T08:31:45","date_gmt":"2015-06-10T06:31:45","guid":{"rendered":"https:\/\/wpcalc.com\/?p=60614"},"modified":"2025-05-20T09:53:18","modified_gmt":"2025-05-20T06:53:18","slug":"child-gender-updating-blood","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/pregnancy-baby\/child-gender-updating-blood\/","title":{"rendered":"Child Gender by Blood Renewal"},"content":{"rendered":"<section class=\"not-prose calculator-box\" aria-labelledby=\"calculator-title\"><div class=\"flex items-baseline sm:items-center justify-between gap-2 sm:gap-3\"><div class=\"flex flex-col sm:flex-row sm:items-center gap-2\"><span class=\"icon icon-calculator text-primary-700! text-base! dark:text-primary-300!\" aria-hidden=\"true\"><\/span><h2 class=\"text-lg font-display font-bold\">Baby Gender Predictor Based on Blood Renewal<\/h2><\/div><div class=\"relative group inline-block\">\n  <button class=\"favorite\" id=\"favorite\" data-favorite-id=\"60614\" data-favorite-title=\"Child Gender by Blood Renewal\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/pregnancy-baby\/child-gender-updating-blood\/\" data-favorite-excerpt=\"Based on a popular theory, this calculator predicts the gender of a baby by comparing the biological \u201crenewal cycles\u201d of blood in both parents. According to the concept, blood in men renews every 4 years and in women every 3 years. The parent whose blood is \u201cnewer\u201d at the time of conception is believed to pass on their gender to the child. While not scientifically proven, this method is widely used as a fun way to guess a baby\u2019s gender.\" aria-label=\"Add to Favorites\" data-favorite-icon=\"icon icon-pacifier\">\n    <span class=\"icon icon-shape-star-empty\"><\/span>\n  <\/button>\n  <div class=\"absolute right-full -translate-y-1\/2 top-1\/2 mr-2 w-max max-w-xs px-3 py-2 bg-gray-800 text-white text-xs rounded shadow-lg opacity-0 group-hover:opacity-100 transition-opacity duration-200 z-10 pointer-events-none\">\n   <span class=\"favorite-tooltip\" id=\"favorite-tooltip\"><\/span>\n  <\/div>\n<\/div><\/div><form action=\"https:\/\/wpcalc.com\/en\/pregnancy-baby\/child-gender-updating-blood\/\" method=\"POST\" class=\"calculator\" id=\"calculator-60614\" data-post=\"60614\"><fieldset class=\"fieldset-input is-1\"><legend class=\"sr-only\">Input Fields<\/legend><div class=\"field\" id=\"input-1\"><label for=\"field-1\">Date of birth of the father<\/label><input type=\"date\" name=\"date_of_birth_of_the_father\" id=\"field-1\" step=\"any\" value=\"1996-04-04\"\/><\/div><div class=\"field\" id=\"input-2\"><label for=\"field-2\">Date of birth of the mother<\/label><input type=\"date\" name=\"date_of_birth_of_the_mother\" id=\"field-2\" step=\"any\" value=\"1998-04-04\"\/><\/div><div class=\"field\" id=\"input-3\"><label for=\"field-3\">Conception date<\/label><input type=\"date\" name=\"conception_date\" id=\"field-3\" step=\"any\" value=\"2026-04-04\"\/><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Re-Calculate\" id=\"calculate-button\" data-post=\"60614\">Calculate<\/button><button type=\"reset\">Reset<\/button><\/div><div class=\"field is-checkbox hidden!\" id=\"field-auto-calc\"><input type=\"checkbox\" id=\"auto-calc\"><label for=\"auto-calc\">Calculate automatically<\/label><small>If enabled, the result will update automatically when you change any value.<\/small><\/div><div class=\"fieldset-result is-hidden\" aria-labelledby=\"result-title\" aria-live=\"polite\" role=\"region\"> <h3 class=\"result-title bg-gradient-to-r from-primary-50 to-gray-50 dark:from-primary-900 dark:to-gray-800\" id=\"result-title\"><span class=\"icon icon-s-pulse\" aria-hidden=\"true\"><\/span> Your Results<\/h3><div class=\"result-box\"><div class=\"field-result\" id=\"output-1\"><span class=\"field-title\"><span>The sex of the child<\/span><\/span><span class=\"field-value\" id=\"result-1\"><\/span><button class=\"copy-result\" data-tooltip=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-2\"><span class=\"field-title\"><span>Last update of father\u2019s blood<\/span><\/span><span class=\"field-value\" id=\"result-2\"><\/span><button class=\"copy-result\" data-tooltip=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\"><\/span><\/button><\/div><div class=\"field-result\" id=\"output-3\"><span class=\"field-title\"><span>Last update of mater&#039;s blood<\/span><\/span><span class=\"field-value\" id=\"result-3\"><\/span><button class=\"copy-result\" data-tooltip=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\"><\/span><\/button><\/div><\/div><\/div><a href=\"#respond\" class=\"hidden transition-opacity duration-300 opacity-0 w-50 text-sm justify-center items-center gap-2 px-4 py-2 rounded bg-gray-200 text-gray-700 hover:bg-gray-300\" id=\"leave-comment\"><span class=\"icon icon-comments\" aria-hidden=\"true\"><\/span>Leave a Comment<\/a><\/form><\/section><section id=\"calc-reactions\" class=\"not-prose hidden my-12 bg-gradient-to-r from-primary-50 to-gray-50 border border-indigo-100 rounded-xl px-6 py-4 shadow-sm\" data-post=\"60614\" aria-live=\"polite\"><h2 class=\"text-sm text-gray-500 text-center mb-2\">How did this result make you feel?<\/h2><div class=\"grid grid-cols-3 sm:flex sm:flex-row sm:justify-around gap-4 sm:items-center sm:flex-wrap\"><button class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"like\"><span class=\"reaction-count\" data-reaction-count=\"like\">7<\/span><span class=\"reaction text-3xl\">\ud83d\ude00 <\/span><span class=\"reaction-description font-medium\">Like <\/span><\/button><button class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"helpful\"><span class=\"reaction-count\" data-reaction-count=\"helpful\">0<\/span><span class=\"reaction text-3xl\">\ud83d\udca1 <\/span><span class=\"reaction-description font-medium\">Helpful <\/span><\/button><button class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"confused\"><span class=\"reaction-count\" data-reaction-count=\"confused\">7<\/span><span class=\"reaction text-3xl\">\ud83d\ude15 <\/span><span class=\"reaction-description font-medium\">Confused <\/span><\/button><button class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"disappointed\"><span class=\"reaction-count\" data-reaction-count=\"disappointed\">2<\/span><span class=\"reaction text-3xl\">\ud83d\ude1e <\/span><span class=\"reaction-description font-medium\">Disappointed <\/span><\/button><button class=\"reaction-btn flex flex-col items-center gap-1 text-sm text-gray-700 hover:text-primary-600 cursor-pointer transition-transform hover:scale-105\" data-reaction=\"inaccurate\"><span class=\"reaction-count\" data-reaction-count=\"inaccurate\">8<\/span><span class=\"reaction text-3xl\">\u274c <\/span><span class=\"reaction-description font-medium\">Inaccurate <\/span><\/button><\/div><div id=\"reaction-message\" class=\"hidden mt-8 rounded-md border border-primary-100 bg-white\/50 backdrop-blur-sm px-4 py-2 text-sm text-center shadow-sm\"><\/div><\/section><ins class=\"adsbygoogle\"\n     style=\"display:block; text-align:center; margin: 32px 0;\"\n     data-ad-layout=\"in-article\"\n     data-ad-format=\"fluid\"\n     data-ad-client=\"ca-pub-1721569815777345\"\n     data-ad-slot=\"6317458308\"><\/ins>\n<script>\n     (adsbygoogle = window.adsbygoogle || []).push({});\n<\/script>\n<p><section class=\"formula-box\" aria-labelledby=\"formula-title\">\r\n\t<div id=\"formula-title\" class=\"not-prose font-display mb-4\"><span class=\"icon icon-formula\" aria-hidden=\"true\"><\/span><h2>Blood Renewal Cycle Formula<\/h2><\/div>\r\n\t<figure class=\"not-prose formula\">\r\n\t\t<figcaption class=\"formula-title\">Formula<\/figcaption>\r\n\t\t<div class=\"text-base text-gray-800\" id=\"formula\">\n$$\\text{Age Difference (mod)} =\n\\begin{cases}\n\\text{Father&#8217;s Age} \\bmod 4 \\\\\n\\text{Mother&#8217;s Age} \\bmod 3\n\\end{cases}$$\n<\/div>\r\n\t<\/figure>\r\n\t<br \/>\nWhichever parent has the lower remainder (i.e. more recently \u201crenewed\u201d blood), their gender is considered dominant:<\/p>\n<ul>\n<li>Lower remainder for <strong>father \u2192 Boy<\/strong><\/li>\n<li>Lower remainder for <strong>mother \u2192 Girl<\/strong><\/li>\n<\/ul>\n<p>If the remainders are equal, some believe twins or a random outcome is possible.<br \/>\r\n<\/section><br \/>\nThe blood renewal method is based on the idea that men\u2019s blood is completely renewed every 4 years, while women\u2019s blood is renewed every 3 years. To use this method, you only need the age of both parents at the time of conception. This tool calculates which parent had \u201cfresher\u201d blood and predicts the child\u2019s gender accordingly. This method has no medical backing, but it\u2019s a fascinating cultural approach used across Eastern Europe and Asia for gender guessing.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Based on a popular theory, this calculator predicts the gender of a baby by comparing the biological \u201crenewal cycles\u201d of blood in both parents. According to the concept, blood in men renews every 4 years and in women every 3 years. The parent whose blood is \u201cnewer\u201d at the time of conception is believed to pass on their gender to the child. While not scientifically proven, this method is widely used as a fun way to guess a baby\u2019s gender.<\/p>\n","protected":false},"author":70,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[45],"tags":[49],"class_list":["post-60614","post","type-post","status-publish","format-standard","hentry","category-pregnancy-baby","tag-baby-gender-prediction"],"acf":[],"_links":{"self":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/60614","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/users\/70"}],"replies":[{"embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/comments?post=60614"}],"version-history":[{"count":2,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/60614\/revisions"}],"predecessor-version":[{"id":63989,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/60614\/revisions\/63989"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=60614"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=60614"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=60614"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}