{"id":2121,"date":"2024-03-22T09:50:16","date_gmt":"2024-03-22T13:50:16","guid":{"rendered":"https:\/\/www.sosgrossesse.ca\/contraception\/calendar-method\/"},"modified":"2025-04-09T14:22:07","modified_gmt":"2025-04-09T18:22:07","slug":"calendar-method","status":"publish","type":"page","link":"https:\/\/www.sosgrossesse.ca\/en\/contraception\/calendar-method\/","title":{"rendered":"Calendar method"},"content":{"rendered":"\n<div class=\"wp-block-columns col-direction-mobile is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column col-direction-mobile-order-2 is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:66.66%\">\n<p><em>This method is also known as the &#8220;Ogino method&#8221; or &#8220;fertility calculation&#8221;.<\/em><\/p>\n\n\n\n<p><strong>How <\/strong>it <strong>works: <\/strong>identify the moment of ovulation by observing the menstrual cycle for at least 6 months. This period ensures that the observations are representative of the person&#8217;s menstrual cycle.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>This method may be easier for people with a regular menstrual cycle. However, it presents difficulties for two main reasons:<\/li>\n<\/ul>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Irregular cycles<\/strong>: Most people have irregular menstrual cycles, which makes it difficult to determine the precise moment of ovulation.<\/li>\n\n\n\n<li><strong>Coordination with the\u2027a partner<\/strong>: both partners should agree to avoid unprotected intercourse during fertile periods or use an additional contraceptive method, such as condoms.<\/li>\n<\/ol>\n\n\n\n<p><strong>Efficiency<\/strong>: Typical use: 80%, perfect use: 91-99%.<\/p>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"purple margin-top-60 avantage\"><strong>Benefits<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity hr--wave\"\/>\n\n\n\n<ul class=\"wp-block-list avantage-list\">\n<li>Uterus-controlled method<\/li>\n\n\n\n<li>Free and always available<\/li>\n\n\n\n<li>Does not affect hormonal system, cycle length or blood flow<\/li>\n\n\n\n<li>Gives you a better understanding of your cycle and your body<\/li>\n\n\n\n<li>Does not limit the spontaneity of sexual relations<\/li>\n\n\n\n<li>Promotes communication and collaboration between partners<\/li>\n\n\n\n<li>Suitable for people with moral or religious concerns about other contraceptive methods<\/li>\n<\/ul>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<p class=\"class=&quot;purple margin-top-60 avantage&quot;\"><strong>Disadvantages<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity hr--wave\"\/>\n\n\n\n<ul class=\"wp-block-list avantage-list\">\n<li>Requires several months&#8217; observation of the menstrual cycle before application<\/li>\n\n\n\n<li>Requires a regular menstrual cycle, which limits its use<\/li>\n\n\n\n<li>Events such as stress, overwork or illness can affect reliability<\/li>\n\n\n\n<li>Not recommended during periods of cycle disturbance (post-partum, breastfeeding, after miscarriage, approaching menopause, after stopping hormonal contraception).<\/li>\n\n\n\n<li>Limits intercourse with vaginal penetration to periods of infertility and requires an additional method during fertile periods<\/li>\n<\/ul>\n<\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column green-notice margin-top-60 is-layout-flow wp-block-column-is-layout-flow\">\n<h2 class=\"wp-block-heading h3 purple margin-top-30\">FAQ<\/h2>\n\n\n<div style=\"padding-top: 0rem; padding-left: 0px; padding-right: 0px; padding-bottom: 0rem; margin-top: 0px; margin-left: 0px; margin-right: 0px; margin-bottom: 0px; \" class=\"wp-block-ub-content-toggle wp-block-ub-content-toggle-block\" id=\"ub-content-toggle-block-1abfe507-c235-4b04-aa9a-9da29e3d2a3a\" data-mobilecollapse=\"false\" data-desktopcollapse=\"true\" data-preventcollapse=\"false\" data-showonlyone=\"false\">\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f2f2f200; \" id=\"ub-content-toggle-panel-block-\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f2f2f200;\" aria-controls=\"ub-content-toggle-panel-0-1abfe507-c235-4b04-aa9a-9da29e3d2a3a\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-1abfe507-c235-4b04-aa9a-9da29e3d2a3a\" style=\"color: #933e89; \"><strong><strong><strong><strong>How to calculate the risk period for pregnancy using the calendar method?<\/strong><\/strong><\/strong><\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"false\" class=\"wp-block-ub-content-toggle-accordion-content-wrap ub-hide\" id=\"ub-content-toggle-panel-0-1abfe507-c235-4b04-aa9a-9da29e3d2a3a\">\n\n<p>To calculate the period at risk, you need :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Estimate ovulation date.<\/li>\n\n\n\n<li>Identify high-risk days and avoid sexual relations during this period, or use another method of contraception.<\/li>\n<\/ul>\n\n\n\n<p>To determine the abstinence period :<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Subtract 18 days from the longest menstrual cycle.<\/li>\n\n\n\n<li>Subtract 11 days from the shortest menstrual cycle.<\/li>\n<\/ul>\n\n\n\n<p>For example, for 26- to 29-day cycles, avoid intercourse from day 8 (26-18) to day 18 (29-11) of each cycle. The first day of menstruation is Day 1.<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f2f2f200; \" id=\"ub-content-toggle-panel-block-\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f2f2f200;\" aria-controls=\"ub-content-toggle-panel-1-1abfe507-c235-4b04-aa9a-9da29e3d2a3a\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-1abfe507-c235-4b04-aa9a-9da29e3d2a3a\" style=\"color: #933e89; \"><strong><strong><strong><strong>Is this method effective?<\/strong><\/strong><\/strong><\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"false\" class=\"wp-block-ub-content-toggle-accordion-content-wrap ub-hide\" id=\"ub-content-toggle-panel-1-1abfe507-c235-4b04-aa9a-9da29e3d2a3a\">\n\n<p>This method allows you to control your fertility, but it can be difficult to precisely identify the period at risk, which can affect its effectiveness.<\/p>\n\n<\/div>\n\t\t<\/div>\n\n<div class=\"wp-block-ub-content-toggle-accordion\" style=\"border-color: #f2f2f200; \" id=\"ub-content-toggle-panel-block-\">\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-title-wrap\" style=\"background-color: #f2f2f200;\" aria-controls=\"ub-content-toggle-panel-2-1abfe507-c235-4b04-aa9a-9da29e3d2a3a\" tabindex=\"0\">\n\t\t\t<p class=\"wp-block-ub-content-toggle-accordion-title ub-content-toggle-title-1abfe507-c235-4b04-aa9a-9da29e3d2a3a\" style=\"color: #933e89; \"><strong><strong><strong><strong>Are there mobile apps to use this method?<\/strong><\/strong><\/strong><\/strong><\/p>\n\t\t\t<div class=\"wp-block-ub-content-toggle-accordion-toggle-wrap right\" style=\"color: #000000;\"><span class=\"wp-block-ub-content-toggle-accordion-state-indicator wp-block-ub-chevron-down\"><\/span><\/div>\n\t\t<\/div>\n\t\t\t<div role=\"region\" aria-expanded=\"false\" class=\"wp-block-ub-content-toggle-accordion-content-wrap ub-hide\" id=\"ub-content-toggle-panel-2-1abfe507-c235-4b04-aa9a-9da29e3d2a3a\">\n\n<p>Yes, several mobile applications can provide a calendar and estimate the date of ovulation and menstruation. They provide quick access to information. A paper calendar can also be used to mark important dates.<\/p>\n\n<\/div>\n\t\t<\/div>\n<\/div><\/div>\n<\/div>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p><\/p>\n\n\n\n<p><em>Sources: \u00c7a se planifie. A guide to choosing the right contraception, on The Society of Obstetricians and Gynaecologists of Canada (SOGC). Available at: https: <a href=\"https:\/\/www.caseplanifie.ca\/\">\/\/www.caseplanifie.ca\/<\/a> (consulted on 08-2024).<\/em><\/p>\n<\/blockquote>\n<\/div>\n\n\n\n<div class=\"wp-block-column col-direction-mobile-order-1 is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:33.33%\"><nav class=\"is-responsive wp-block-navigation is-layout-flex wp-block-navigation-is-layout-flex\" aria-label=\"Navigation\" \n\t\t data-wp-interactive=\"core\/navigation\" data-wp-context='{\"overlayOpenedBy\":{\"click\":false,\"hover\":false,\"focus\":false},\"type\":\"overlay\",\"roleAttribute\":\"\",\"ariaLabel\":\"Menu\"}'><button aria-haspopup=\"dialog\" aria-label=\"Open menu\" class=\"wp-block-navigation__responsive-container-open\" \n\t\t\t\tdata-wp-on-async--click=\"actions.openMenuOnClick\"\n\t\t\t\tdata-wp-on--keydown=\"actions.handleMenuKeydown\"\n\t\t\t><svg width=\"24\" height=\"24\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 24 24\" aria-hidden=\"true\" focusable=\"false\"><rect x=\"4\" y=\"7.5\" width=\"16\" height=\"1.5\" \/><rect x=\"4\" y=\"15\" width=\"16\" height=\"1.5\" \/><\/svg><\/button>\n\t\t\t\t<div class=\"wp-block-navigation__responsive-container\"  id=\"modal-1\" \n\t\t\t\tdata-wp-class--has-modal-open=\"state.isMenuOpen\"\n\t\t\t\tdata-wp-class--is-menu-open=\"state.isMenuOpen\"\n\t\t\t\tdata-wp-watch=\"callbacks.initMenu\"\n\t\t\t\tdata-wp-on--keydown=\"actions.handleMenuKeydown\"\n\t\t\t\tdata-wp-on-async--focusout=\"actions.handleMenuFocusout\"\n\t\t\t\ttabindex=\"-1\"\n\t\t\t>\n\t\t\t\t\t<div class=\"wp-block-navigation__responsive-close\" tabindex=\"-1\">\n\t\t\t\t\t\t<div class=\"wp-block-navigation__responsive-dialog\" \n\t\t\t\tdata-wp-bind--aria-modal=\"state.ariaModal\"\n\t\t\t\tdata-wp-bind--aria-label=\"state.ariaLabel\"\n\t\t\t\tdata-wp-bind--role=\"state.roleAttribute\"\n\t\t\t>\n\t\t\t\t\t\t\t<button aria-label=\"Close menu\" class=\"wp-block-navigation__responsive-container-close\" \n\t\t\t\tdata-wp-on-async--click=\"actions.closeMenuOnClick\"\n\t\t\t><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 24 24\" width=\"24\" height=\"24\" aria-hidden=\"true\" focusable=\"false\"><path d=\"m13.06 12 6.47-6.47-1.06-1.06L12 10.94 5.53 4.47 4.47 5.53 10.94 12l-6.47 6.47 1.06 1.06L12 13.06l6.47 6.47 1.06-1.06L13.06 12Z\"><\/path><\/svg><\/button>\n\t\t\t\t\t\t\t<div class=\"wp-block-navigation__responsive-container-content\" \n\t\t\t\tdata-wp-watch=\"callbacks.focusFirstElement\"\n\t\t\t id=\"modal-1-content\">\n\t\t\t\t\t\t\t\t<ul class=\"wp-block-navigation__container is-responsive wp-block-navigation\"><li class=\" wp-block-navigation-item no-link wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"#\"><span class=\"wp-block-navigation-item__label\"><strong>Hormonal methods<\/strong><\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/combined-contraceptive-pill-and-progestin-only-oral-contraceptive-cops\/\"><span class=\"wp-block-navigation-item__label\">Combined contraceptive pill and progestin-only oral contraceptive (COPS)<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/contraceptive-ring\/\"><span class=\"wp-block-navigation-item__label\">Contraceptive ring<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/contraceptive-patch\/\"><span class=\"wp-block-navigation-item__label\">Contraceptive patch<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/contraceptive-injections\/\"><span class=\"wp-block-navigation-item__label\">Contraceptive injections<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/hormonal-iud\/\"><span class=\"wp-block-navigation-item__label\">Hormonal IUD<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/contraceptive-implants\/\"><span class=\"wp-block-navigation-item__label\">Contraceptive implants<\/span><\/a><\/li><li class=\" wp-block-navigation-item no-link wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"#\"><span class=\"wp-block-navigation-item__label\">Non-hormonal methods<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/copper-iud\/\"><span class=\"wp-block-navigation-item__label\">Copper IUD<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/external-condom\/\"><span class=\"wp-block-navigation-item__label\">External condom<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/internal-condom\/\"><span class=\"wp-block-navigation-item__label\">Internal condom<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/diaphragm\/\"><span class=\"wp-block-navigation-item__label\">Diaphragm<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/contraceptive-sponge\/\"><span class=\"wp-block-navigation-item__label\">Contraceptive sponge<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/vasectomy\/\"><span class=\"wp-block-navigation-item__label\">Vasectomy<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/tubal-ligation-removal\/\"><span class=\"wp-block-navigation-item__label\">Tubal ligation \/ removal<\/span><\/a><\/li><li class=\" wp-block-navigation-item no-link wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"#\"><span class=\"wp-block-navigation-item__label\">Fertility control methods<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/calendar-method\/\"><span class=\"wp-block-navigation-item__label\">Calendar method<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/withdrawal-method\/\"><span class=\"wp-block-navigation-item__label\">Withdrawal method<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/symptothermal-method\/\"><span class=\"wp-block-navigation-item__label\">Symptothermal method<\/span><\/a><\/li><li class=\" wp-block-navigation-item no-link wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"#\"><span class=\"wp-block-navigation-item__label\">Emergency contraception<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/emergency-oral-contraception-eoc\/\"><span class=\"wp-block-navigation-item__label\">Emergency oral contraception<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/emergency-iud\/\"><span class=\"wp-block-navigation-item__label\">Emergency IUD<\/span><\/a><\/li><li class=\" wp-block-navigation-item no-link wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"#\"><span class=\"wp-block-navigation-item__label\">Reproductive system<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/womens-reproductive-function\/\"><span class=\"wp-block-navigation-item__label\">Women&#8217;s reproductive function<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/mens-reproductive-function\/\"><span class=\"wp-block-navigation-item__label\">Men&#8217;s reproductive function<\/span><\/a><\/li><li class=\" wp-block-navigation-item wp-block-navigation-link\"><a class=\"wp-block-navigation-item__content\"  href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/sexuality-and-the-body\/\"><span class=\"wp-block-navigation-item__label\">Sexuality and the body<\/span><\/a><\/li><\/ul>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div><\/nav><\/div>\n<\/div>\n\n\n\n<div class=\"wp-block-columns margin-top-120 is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-vertically-aligned-top center is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image blue-circle--dotted margin-bottom-30 center\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1389\" height=\"1389\" src=\"https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2025\/01\/mains_bleus.png\" alt=\"\" class=\"wp-image-1496\" srcset=\"https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2025\/01\/mains_bleus.png 1389w, https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2025\/01\/mains_bleus-300x300.png 300w, https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2025\/01\/mains_bleus-1024x1024.png 1024w, https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2025\/01\/mains_bleus-150x150.png 150w, https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2025\/01\/mains_bleus-768x768.png 768w\" sizes=\"auto, (max-width: 1389px) 100vw, 1389px\" \/><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading h3 text-center\">Perinatal bereavement<\/h2>\n\n\n\n<p class=\"text-center center\"><a class=\"button button--secondary button--small sm-margin-bottom-70\" href=\"https:\/\/www.sosgrossesse.ca\/en\/perinatal-bereavement\/\">Read more<\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image purple-circle--dotted margin-bottom-30 center\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1442\" height=\"1442\" src=\"https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2025\/01\/fonce_framboise.png\" alt=\"\" class=\"wp-image-1494\" srcset=\"https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2025\/01\/fonce_framboise.png 1442w, https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2025\/01\/fonce_framboise-300x300.png 300w, https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2025\/01\/fonce_framboise-1024x1024.png 1024w, https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2025\/01\/fonce_framboise-150x150.png 150w, https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2025\/01\/fonce_framboise-768x768.png 768w\" sizes=\"auto, (max-width: 1442px) 100vw, 1442px\" \/><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading h3 text-center\">Whether or not to continue the pregnancy<\/h2>\n\n\n\n<p class=\"text-center center\"><a class=\"button button--secondary button--small sm-margin-bottom-70\" href=\"https:\/\/www.sosgrossesse.ca\/en\/absence-and-search-for-pregnancy\/\">Read more<\/a><\/p>\n<\/div>\n\n\n\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\"><div class=\"wp-block-image blue-circle--dotted margin-bottom-30 center\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1516\" height=\"1516\" src=\"https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2024\/03\/fonce_contraception-1.png\" alt=\"\" class=\"wp-image-1502\" srcset=\"https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2024\/03\/fonce_contraception-1.png 1516w, https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2024\/03\/fonce_contraception-1-300x300.png 300w, https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2024\/03\/fonce_contraception-1-1024x1024.png 1024w, https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2024\/03\/fonce_contraception-1-150x150.png 150w, https:\/\/www.sosgrossesse.ca\/wp-content\/uploads\/2024\/03\/fonce_contraception-1-768x768.png 768w\" sizes=\"auto, (max-width: 1516px) 100vw, 1516px\" \/><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading h3 text-center\">Contraception<br\/><\/h2>\n\n\n\n<p class=\"text-center center\"><a class=\"button button--secondary button--small sm-margin-bottom-70\" href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/\">Read more<\/a><\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>This method is also known as the &#8220;Ogino method&#8221; or &#8220;fertility calculation&#8221;. 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Grossesse Qu\u00e9bec<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.sosgrossesse.ca\/en\/contraception\/calendar-method\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Calendar method - S.O.S. Grossesse Qu\u00e9bec\" \/>\n<meta property=\"og:description\" content=\"This method is also known as the &#8220;Ogino method&#8221; or &#8220;fertility calculation&#8221;. How it works: identify the moment of ovulation by observing the menstrual cycle for at least 6 months. This period ensures that the observations are representative of the person&#8217;s menstrual cycle. Efficiency: Typical use: 80%, perfect use: 91-99%. 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