{"id":6230,"date":"2015-07-24T15:36:00","date_gmt":"2015-07-24T12:36:00","guid":{"rendered":"https:\/\/serkanoral.com\/hamilelik-haftasi-nasil-hesaplanir\/"},"modified":"2025-09-04T21:41:45","modified_gmt":"2025-09-04T18:41:45","slug":"how-to-calculate-pregnancy-weeks","status":"publish","type":"post","link":"https:\/\/serkanoral.com\/en\/how-to-calculate-pregnancy-weeks\/","title":{"rendered":"How to Calculate Pregnancy Weeks?"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 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\">\u0130\u00e7indekiler<\/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-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/serkanoral.com\/en\/how-to-calculate-pregnancy-weeks\/#how-to-calculate-pregnancy-weeks\" >How to Calculate Pregnancy Weeks?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/serkanoral.com\/en\/how-to-calculate-pregnancy-weeks\/#how-to-calculate-pregnancy-weeks-2\" >How to calculate pregnancy weeks?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/serkanoral.com\/en\/how-to-calculate-pregnancy-weeks\/#how-to-calculate-pregnancy-weeks-using-the-negele-method\" >How to calculate pregnancy weeks using the Negele method?<\/a><\/li><\/ul><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"how-to-calculate-pregnancy-weeks-2\"><\/span>How to calculate pregnancy weeks?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"viewer-yn14k27213\">There are many different methods used to calculate the pregnancy week. However, many times, mothers and fathers cannot calculate the pregnancy week or calculate it incorrectly. The reason for this is that the pregnancy week is calculated not according to the day of fertilization, but according to the first day of the last menstrual period.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"viewer-yq2ou27215\">The time when pregnancy, i.e. fertilization, occurs is approximately 15 days after the last menstrual period. However, when calculating the pregnancy week, the menstrual period before this date is taken into account, not this date.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"viewer-zs1vr27217\">Unless there is any pregnancy-related condition, gynecologists calculate <a href=\"https:\/\/serkanoral.com\/en\/how-to-calculate-pregnancy-weeks\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>the pregnancy week<\/strong><\/a> with a very simple formula.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"viewer-xz37g27221\"><span class=\"ez-toc-section\" id=\"how-to-calculate-pregnancy-weeks-using-the-negele-method\"><\/span>How to calculate pregnancy weeks using the Negele method?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"viewer-3zmdu27223\">The day when the expectant mother will give birth to her baby is calculated using a system called the \u201cnegele method.\u201d In this method, the first day of the last menstrual period is taken into account and 7 days are added to this day, going back 3 months.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"viewer-05j8127225\">Let&#8217;s give a short and simple example for you to understand this better; let&#8217;s assume that the first day of a mother&#8217;s last menstrual period is November 21, 2014. When 7 days are added to November 21, we arrive at November 28, 2014. When we go back 3 months from November, we arrive at August. When we add one year to 2014, we arrive at the estimated date of birth of the baby: August 28, 2015<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>November 21 + 7 = November 28<\/li>\n\n\n\n<li>11th month (November) \u2013 3 = 8th month (August)<\/li>\n\n\n\n<li>2014 + 1 year = 2015<\/li>\n\n\n\n<li>RESULT: 28.8.2015<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">However, if a routine period is not seen or if the expectant mother&#8217;s ovulation date changes during that month, it may cause the pregnancy week to differ from the baby&#8217;s actual birth date, i.e., the pregnancy week to be calculated incorrectly. In this case, the ultrasound measurements to be performed in the first 3 months are examined and taken into account. The last menstrual date and the estimated birth date are determined again and follow-ups are carried out as a result of these dates.<\/p>\n\n    <div class=\"xs_social_share_widget xs_share_url after_content \t\tmain_content  wslu-style-1 wslu-share-box-shaped wslu-fill-colored wslu-none wslu-share-horizontal wslu-theme-font-no wslu-main_content\">\n\n\t\t\n        <ul>\n\t\t\t        <\/ul>\n    <\/div> \n","protected":false},"excerpt":{"rendered":"<p>How to calculate pregnancy weeks? There are many different methods used to calculate the pregnancy week. However, many times, mothers and fathers cannot calculate the pregnancy week or calculate it incorrectly. The reason for this is that the pregnancy week is calculated not according to the day of fertilization, but according to the first day [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":1833,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[30],"tags":[],"class_list":["post-6230","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-pregnancy"],"_links":{"self":[{"href":"https:\/\/serkanoral.com\/en\/wp-json\/wp\/v2\/posts\/6230","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/serkanoral.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/serkanoral.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/serkanoral.com\/en\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/serkanoral.com\/en\/wp-json\/wp\/v2\/comments?post=6230"}],"version-history":[{"count":0,"href":"https:\/\/serkanoral.com\/en\/wp-json\/wp\/v2\/posts\/6230\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/serkanoral.com\/en\/wp-json\/wp\/v2\/media\/1833"}],"wp:attachment":[{"href":"https:\/\/serkanoral.com\/en\/wp-json\/wp\/v2\/media?parent=6230"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/serkanoral.com\/en\/wp-json\/wp\/v2\/categories?post=6230"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/serkanoral.com\/en\/wp-json\/wp\/v2\/tags?post=6230"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}