{"id":60627,"date":"2015-06-10T08:31:45","date_gmt":"2015-06-10T06:31:45","guid":{"rendered":"https:\/\/wpcalc.com\/?p=60627"},"modified":"2026-09-28T13:49:32","modified_gmt":"2026-09-28T10:49:32","slug":"child-gender-rh-factor-parents","status":"publish","type":"post","link":"https:\/\/wpcalc.com\/en\/pregnancy-baby\/child-gender-rh-factor-parents\/","title":{"rendered":"Child Gender by Rh Factor of Parents"},"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 id=\"calculator-title\" class=\"text-lg font-display font-bold\">Baby Gender Predictor Using Parental Rh Factor<\/h2><\/div><div class=\"calcdash-favorite group\">\n  <button type=\"button\" class=\"favorite\" id=\"favorite\" data-favorite-id=\"60627\" data-favorite-title=\"Child Gender by Rh Factor of Parents\" data-favorite-url=\"https:\/\/wpcalc.com\/en\/pregnancy-baby\/child-gender-rh-factor-parents\/\" data-favorite-excerpt=\"Select each parent\u2019s positive or negative Rh factor to see the calculator\u2019s traditional male-or-female prediction. Rh factors cannot actually predict a child\u2019s sex.\" aria-label=\"Add to Favorites\" data-favorite-icon=\"icon icon-pacifier\">\n    <span class=\"icon icon-shape-star-empty\" aria-hidden=\"true\"><\/span>\n  <\/button>\n  <div class=\"calcdash-favorite__tip\" aria-hidden=\"true\">\n   <span class=\"favorite-tooltip\" id=\"favorite-tooltip\"><\/span>\n  <\/div>\n  <span class=\"sr-only\" role=\"status\" id=\"favorite-status\"><\/span>\n<\/div><\/div><form action=\"https:\/\/wpcalc.com\/en\/pregnancy-baby\/child-gender-rh-factor-parents\/\" method=\"POST\" class=\"calculator\" id=\"calculator-60627\" data-post=\"60627\"><fieldset class=\"fieldset-input\"><legend class=\"sr-only\">Input Fields<\/legend><div class=\"field\" id=\"input-1\"><label for=\"field-1\">Rh factor of the father<\/label><div class=\"grid grid-cols-1\"><select id=\"field-1\" name=\"rh_factor_of_the_father\"><option value=\"1\">Positive<\/option><option value=\"2\">Negative<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><div class=\"field\" id=\"input-2\"><label for=\"field-2\">Rh factor of the mother<\/label><div class=\"grid grid-cols-1\"><select id=\"field-2\" name=\"rh_factor_of_the_mother\"><option value=\"1\">Positive<\/option><option value=\"2\">Negative<\/option><\/select><svg class=\"pointer-events-none col-start-1 row-start-1 mr-2 size-5 self-center justify-self-end text-gray-500 sm:size-4\" viewBox=\"0 0 16 16\" fill=\"currentColor\" aria-hidden=\"true\" data-slot=\"icon\">\n              <path fill-rule=\"evenodd\" d=\"M4.22 6.22a.75.75 0 0 1 1.06 0L8 8.94l2.72-2.72a.75.75 0 1 1 1.06 1.06l-3.25 3.25a.75.75 0 0 1-1.06 0L4.22 7.28a.75.75 0 0 1 0-1.06Z\" clip-rule=\"evenodd\" \/>\n            <\/svg><\/div><\/div><\/fieldset><div class=\"buttons\"><button type=\"submit\" data-text=\"Re-Calculate\" id=\"calculate-button\" data-post=\"60627\">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 type=\"button\" class=\"copy-result\" data-tooltip=\"Copy Result\" aria-label=\"Copy Result\"><span class=\"copy-icon icon icon-document-copy\" aria-hidden=\"true\"><\/span><\/button><\/div><\/div><div class=\"result-actions\"><button type=\"button\" class=\"copy-link\"><svg viewBox=\"0 0 20 20\" fill=\"currentColor\" aria-hidden=\"true\"><path d=\"M12.232 4.232a2.5 2.5 0 0 1 3.536 3.536l-1.225 1.224a.75.75 0 0 0 1.061 1.06l1.224-1.224a4 4 0 0 0-5.656-5.656l-3 3a4 4 0 0 0 .225 5.865.75.75 0 0 0 .977-1.138 2.5 2.5 0 0 1-.142-3.667l3-3Z\"\/><path d=\"M11.603 7.963a.75.75 0 0 0-.977 1.138 2.5 2.5 0 0 1 .142 3.667l-3 3a2.5 2.5 0 0 1-3.536-3.536l1.225-1.224a.75.75 0 0 0-1.061-1.06l-1.224 1.224a4 4 0 1 0 5.656 5.656l3-3a4 4 0 0 0-.225-5.865Z\"\/><\/svg><span class=\"copy-link__text\">Copy link to this calculation<\/span><\/button><span class=\"sr-only\" role=\"status\" id=\"copy-link-status\"><\/span><\/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=\"60627\" aria-live=\"polite\" aria-labelledby=\"calc-reactions-title\"><p id=\"calc-reactions-title\" class=\"text-sm text-gray-500 text-center mb-2\">How did this result make you feel?<\/p><div role=\"group\" aria-labelledby=\"calc-reactions-title\" class=\"grid grid-cols-3 sm:flex sm:flex-row sm:justify-around gap-4 sm:items-center sm:flex-wrap\"><button type=\"button\" aria-pressed=\"false\" 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\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude00 <\/span><span class=\"reaction-description font-medium\">Like <\/span><\/button><button type=\"button\" aria-pressed=\"false\" 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\" aria-hidden=\"true\">\ud83d\udca1 <\/span><span class=\"reaction-description font-medium\">Helpful <\/span><\/button><button type=\"button\" aria-pressed=\"false\" 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\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude15 <\/span><span class=\"reaction-description font-medium\">Confused <\/span><\/button><button type=\"button\" aria-pressed=\"false\" 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\">1<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\ud83d\ude1e <\/span><span class=\"reaction-description font-medium\">Disappointed <\/span><\/button><button type=\"button\" aria-pressed=\"false\" 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\">0<\/span><span class=\"reaction text-3xl\" aria-hidden=\"true\">\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><div class=\"calcdash-ad not-prose calcdash-ad--calc_result calcdash-ad--in-article\"><ins class=\"adsbygoogle\" style=\"display:block\" data-ad-client=\"ca-pub-1721569815777345\" data-ad-slot=\"6317458308\" data-ad-layout=\"in-article\" data-ad-format=\"fluid\"><\/ins><script>(adsbygoogle = window.adsbygoogle || []).push({});<\/script><\/div>\n<style id=\"wpcoderpro-inline-1\">.formula-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><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>Child Gender by Rh Factor of Parents 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\\[S(P,M)=\\begin{cases}\\text{Male}, &amp; P=M \\\\ \\text{Female}, &amp; P\\ne M\\end{cases}\\]\n<\/div>\r\n\t<\/figure>\r\n\t<\/p>\n<p><strong>Where:<\/strong><\/p>\n<ul>\n<li>\\(P\\) \u2014 the father\u2019s Rh factor, positive or negative.<\/li>\n<li>\\(M\\) \u2014 the mother\u2019s Rh factor, positive or negative.<\/li>\n<li>\\(S\\) \u2014 the calculator\u2019s displayed result.<\/li>\n<\/ul>\n<p>This is the calculator\u2019s traditional prediction rule: matching Rh factors give \u201cMale,\u201d and different Rh factors give \u201cFemale.\u201d It is not a biological formula or a reliable way to predict a child\u2019s sex.<\/p>\n<p>\r\n<\/section>\n<style id=\"wpcoderpro-inline-459\">.calculation-box {\r\n\tborder-bottom: none !important;\r\n}<\/style><section id=\"calculation\" class=\"calculation-box\" aria-labelledby=\"calculation-title\">\r\n\t<div id=\"calculation-title\" class=\"not-prose font-display\"><span class=\"icon icon-unordered-list\" aria-hidden=\"true\"><\/span><h2>Child Gender by Rh Factor of Parents \u2013 Calculation Example<\/h2><\/div>\r\n\r\n<\/p>\n<p><strong>Example:<\/strong> the father\u2019s Rh factor is Positive and the mother\u2019s Rh factor is Positive, matching the initial selections in the calculator.<\/p>\n<p>\\[P=\\text{Positive},\\quad M=\\text{Positive}\\quad\\Rightarrow\\quad P=M\\quad\\Rightarrow\\quad S=\\text{Male}\\]<\/p>\n<p><strong>Result:<\/strong> the calculator displays Male. This is a traditional prediction, not a determination of the child\u2019s sex.<\/p>\n<p>\n\r\n<\/section>\n<h2>How to use the calculator<\/h2>\n<ol>\n<li>In <strong>Rh factor of the father<\/strong>, select Positive or Negative.<\/li>\n<li>In <strong>Rh factor of the mother<\/strong>, select Positive or Negative.<\/li>\n<li>Read <strong>The sex of the child<\/strong> result. The calculator displays Male when the selections match and Female when they differ.<\/li>\n<\/ol>\n<p>If you do not know either parent\u2019s Rh factor, check a reliable blood test result rather than guessing. Even with correct entries, the displayed answer is only the result of the traditional rule; a blood test does not make this rule scientifically predictive.<\/p>\n<h2>What does the Rh factor tell you?<\/h2>\n<p>The Rh factor usually refers to the RhD antigen, a protein that may be present on red blood cells. A person whose red blood cells have the D antigen is described as Rh-positive; someone without it is Rh-negative. Rh status is inherited and is commonly reported alongside the ABO blood group, such as A positive or O negative.<\/p>\n<p>Rh status does <strong>not<\/strong> determine whether a baby will be male or female. In typical human development, chromosomal sex is established at fertilization by the chromosomes contributed by the egg and sperm. The parents\u2019 positive or negative Rh test results do not reveal which sperm fertilized the egg. Differences in sex development can also occur, so the calculator\u2019s two labels do not describe every person.<\/p>\n<p>The result is therefore best understood as a description of a folk rule, not as a probability, diagnosis, or finding about a pregnancy. \u201cMale\u201d does not mean a boy is more likely, and \u201cFemale\u201d does not mean a girl is more likely. Changing an Rh selection changes the rule\u2019s output, not the biology of conception.<\/p>\n<h2>All Rh-factor combinations<\/h2>\n<table>\n<thead>\n<tr>\n<th>Father<\/th>\n<th>Mother<\/th>\n<th>Calculator result<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Positive<\/td>\n<td>Positive<\/td>\n<td>Male<\/td>\n<\/tr>\n<tr>\n<td>Positive<\/td>\n<td>Negative<\/td>\n<td>Female<\/td>\n<\/tr>\n<tr>\n<td>Negative<\/td>\n<td>Positive<\/td>\n<td>Female<\/td>\n<\/tr>\n<tr>\n<td>Negative<\/td>\n<td>Negative<\/td>\n<td>Male<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>The table shows the complete calculation: there are only four possible pairs of selections. No pregnancy details, family history, or test results beyond the two Rh selections affect what this calculator displays.<\/p>\n<h2>Limitations and practical considerations<\/h2>\n<p>Do not use this result to make medical, pregnancy, or family-planning decisions. Rh status can matter during pregnancy, but for a different reason: an Rh-negative pregnant person carrying an Rh-positive fetus may develop antibodies against the fetus\u2019s red blood cells, particularly after exposure to fetal blood. Prenatal care includes appropriate blood tests, and a clinician can advise whether preventive anti-D treatment is needed. The father\u2019s Rh status alone does not establish the fetus\u2019s Rh status or whether treatment is necessary.<\/p>\n<p>If you are curious about other traditional predictions, the <a href=\"https:\/\/wpcalc.com\/en\/pregnancy-baby\/chinese-baby-gender-calculator\/\">Chinese Baby Gender calculator<\/a> and <a href=\"https:\/\/wpcalc.com\/en\/pregnancy-baby\/child-gender-parent-blood-type\/\">Child Gender by Parent Blood Type calculator<\/a> are also for entertainment, not medical prediction. For a practical pregnancy estimate, use the <a href=\"https:\/\/wpcalc.com\/en\/pregnancy-baby\/gestational-age\/\">Gestational Age Calculator<\/a>. Ask a prenatal care professional which tests can provide information about fetal sex and when they are appropriate.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Select each parent\u2019s positive or negative Rh factor to see the calculator\u2019s traditional male-or-female prediction. Rh factors cannot actually predict a child\u2019s sex.<\/p>\n","protected":false},"author":70,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[45],"tags":[49],"class_list":["post-60627","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\/60627","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=60627"}],"version-history":[{"count":3,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/60627\/revisions"}],"predecessor-version":[{"id":65376,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/posts\/60627\/revisions\/65376"}],"wp:attachment":[{"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/media?parent=60627"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/categories?post=60627"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wpcalc.com\/en\/wp-json\/wp\/v2\/tags?post=60627"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}