{"id":11939,"date":"2026-09-16T03:51:30","date_gmt":"2026-09-16T03:51:30","guid":{"rendered":"https:\/\/nygse.com\/?p=11939"},"modified":"2026-09-17T05:58:28","modified_gmt":"2026-09-17T05:58:28","slug":"indice-de-fertilidad-en-endometriosis","status":"publish","type":"post","link":"https:\/\/nygse.com\/es\/endometriosis-fertility-index\/","title":{"rendered":"EFI and Endometriosis: Understanding Your Endometriosis Fertility Index"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"11939\" class=\"elementor elementor-11939\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-2712a5b3 e-flex e-con-boxed e-con e-parent\" data-id=\"2712a5b3\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-127cbd08 elementor-widget elementor-widget-text-editor\" data-id=\"127cbd08\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>For patients with endometriosis who want to become pregnant, an important question after surgery may be: <strong>What are my chances of becoming pregnant naturally?<\/strong><\/p><p>The <strong>Endometriosis Fertility Index (EFI)<\/strong> is a clinical scoring system designed to help estimate the likelihood of pregnancy without assisted reproductive technology after surgical treatment of endometriosis. Rather than relying on endometriosis stage alone, the EFI combines a patient&#8217;s fertility history with findings documented during surgery. <a href=\"#references\"><sup>[1]<\/sup><\/a><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f1dbc1d elementor-widget elementor-widget-heading\" data-id=\"f1dbc1d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What Is the Endometriosis Fertility Index?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a947863 elementor-widget elementor-widget-text-editor\" data-id=\"a947863\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The EFI was developed specifically for patients with surgically documented endometriosis who are trying to conceive.<\/p><p>It produces a score ranging from <strong>0 to 10<\/strong>. In general, higher EFI scores are associated with a greater likelihood of pregnancy without assisted reproductive technology after endometriosis surgery. <a href=\"#references\"><sup>[1]<\/sup><\/a><\/p><p>The EFI is different from endometriosis staging. While staging describes the extent of disease found during surgery, the EFI was designed specifically to provide information about <strong>fertility prognosis after surgery.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-34c5c0a elementor-widget elementor-widget-heading\" data-id=\"34c5c0a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">How Is the EFI Calculated?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f01c378 elementor-widget elementor-widget-text-editor\" data-id=\"f01c378\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>The EFI combines <strong>historical factors<\/strong> with findings documented during surgery.<\/p><p>The historical factors include:<\/p><ul><li>the patient&#8217;s age<\/li><li>duration of infertility<\/li><li>whether the patient has previously been pregnant<\/li><\/ul><p>The surgical portion considers findings related to endometriosis and, importantly, how well certain reproductive structures appear to function after surgery. <a href=\"#references\"><sup>[1]<\/sup><\/a><\/p><p>Together, these factors generate an EFI score between <strong>0 and 10<\/strong>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fce18f2 elementor-widget elementor-widget-image\" data-id=\"fce18f2\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"823\" height=\"359\" src=\"https:\/\/nygse.com\/wp-content\/uploads\/2026\/09\/Endometriosis-Fertility-Index.png\" class=\"attachment-large size-large wp-image-11942\" alt=\"Endometriosis Fertility Index chart showing historical and surgical factors used to calculate the EFI score.\" srcset=\"https:\/\/nygse.com\/wp-content\/uploads\/2026\/09\/Endometriosis-Fertility-Index.png 823w, https:\/\/nygse.com\/wp-content\/uploads\/2026\/09\/Endometriosis-Fertility-Index-300x131.png 300w, https:\/\/nygse.com\/wp-content\/uploads\/2026\/09\/Endometriosis-Fertility-Index-768x335.png 768w, https:\/\/nygse.com\/wp-content\/uploads\/2026\/09\/Endometriosis-Fertility-Index-18x8.png 18w, https:\/\/nygse.com\/wp-content\/uploads\/2026\/09\/Endometriosis-Fertility-Index-480x209.png 480w\" sizes=\"(max-width: 823px) 100vw, 823px\" title=\"Endometriosis Fertility Index (EFI)\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element-custom_font_size elementor-element elementor-element-7558e4c elementor-widget elementor-widget-text-editor\" data-id=\"7558e4c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: center;\"><em><strong>Endometriosis Fertility Index (EFI).<\/strong> The EFI combines historical factors and surgical findings to calculate a score from 0 to 10. Source: Adamson and Pasta (2010).<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b94c45e elementor-widget elementor-widget-heading\" data-id=\"b94c45e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What Is the Least Function Score?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-eff36f4 elementor-widget elementor-widget-text-editor\" data-id=\"eff36f4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>One of the most important components of the EFI is the <strong>Least Function Score<\/strong>.<\/p><p>During surgery, the surgeon evaluates the functional condition of the:<\/p><ul><li>right fallopian tube<\/li><li>left fallopian tube<\/li><li>right ovary<\/li><li>left ovary<\/li><li>fimbria on each side<\/li><\/ul><p>The fimbriae are the delicate structures at the end of the fallopian tubes that help capture the egg after ovulation.<\/p><p>The surgeon assesses how well these reproductive structures appear to function after surgical treatment. The EFI calculation uses the lower functional assessment from each side to help estimate reproductive potential. <a href=\"#references\"><sup>[1]<\/sup><\/a><\/p><p>This makes the surgeon&#8217;s intraoperative assessment an important part of calculating the EFI.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-ed3a1fa elementor-widget elementor-widget-image\" data-id=\"ed3a1fa\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"836\" height=\"402\" src=\"https:\/\/nygse.com\/wp-content\/uploads\/2026\/09\/Endometriosis-Fertility-Index-EFI-Surgery-Form.png\" class=\"attachment-full size-full wp-image-11941\" alt=\"Endometriosis Fertility Index chart showing historical and surgical factors used to calculate the EFI score.\" srcset=\"https:\/\/nygse.com\/wp-content\/uploads\/2026\/09\/Endometriosis-Fertility-Index-EFI-Surgery-Form.png 836w, https:\/\/nygse.com\/wp-content\/uploads\/2026\/09\/Endometriosis-Fertility-Index-EFI-Surgery-Form-300x144.png 300w, https:\/\/nygse.com\/wp-content\/uploads\/2026\/09\/Endometriosis-Fertility-Index-EFI-Surgery-Form-768x369.png 768w, https:\/\/nygse.com\/wp-content\/uploads\/2026\/09\/Endometriosis-Fertility-Index-EFI-Surgery-Form-18x9.png 18w, https:\/\/nygse.com\/wp-content\/uploads\/2026\/09\/Endometriosis-Fertility-Index-EFI-Surgery-Form-480x231.png 480w\" sizes=\"(max-width: 836px) 100vw, 836px\" title=\"Endometriosis Fertility Index (EFI)\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element-custom_font_size elementor-element elementor-element-17b9574 elementor-widget elementor-widget-text-editor\" data-id=\"17b9574\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p style=\"text-align: center;\"><em><strong>Endometriosis Fertility Index (EFI) Surgery Form.<\/strong> The Least Function Score assesses the fallopian tubes, fimbriae, and ovaries at the conclusion of surgery. Source: Adamson and Pasta (2010).<\/em><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2e4d7ea elementor-widget elementor-widget-heading\" data-id=\"2e4d7ea\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">What Does an EFI Score Mean?<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2082ab1 elementor-widget elementor-widget-text-editor\" data-id=\"2082ab1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>A <strong>higher EFI score generally indicates a greater probability of pregnancy without assisted reproductive technology<\/strong>, while a lower score is associated with a lower probability. <a href=\"#references\"><sup>[1]<\/sup><\/a><\/p><p>However, the EFI is <strong>not a guarantee.<\/strong><\/p><p>A high score does not mean that a patient will become pregnant naturally, and a low score does not mean that pregnancy is impossible.<\/p><p>Other factors can also affect fertility, including ovarian reserve, ovulation, sperm factors, tubal function, age, and other reproductive conditions.<\/p><p>The EFI should therefore be understood as a <strong>prognostic tool rather than a prediction of an individual patient&#8217;s outcome.<\/strong><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-75d3730 elementor-widget elementor-widget-heading\" data-id=\"75d3730\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Can the EFI Help Guide Fertility Planning?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6137519 elementor-widget elementor-widget-text-editor\" data-id=\"6137519\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Yes. The EFI can provide useful information when patients and their physicians discuss fertility options following endometriosis surgery.<\/p><p>The European Society of Human Reproduction and Embryology (ESHRE) recommends using the EFI to help counsel patients about their chances of pregnancy after surgery and to help identify patients who may benefit from assisted reproductive technology. <a href=\"#references\"><sup>[2]<\/sup><\/a><\/p><p>Depending on the individual patient, the discussion may include attempting natural conception, fertility evaluation, or assisted reproductive technology such as <strong>in vitro fertilization (IVF).<\/strong><\/p><p>The decision should not be based on the EFI alone. Age, ovarian reserve, semen analysis, previous fertility treatment, reproductive history, and the patient&#8217;s individual goals should also be considered.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-a8a8e73 elementor-widget elementor-widget-heading\" data-id=\"a8a8e73\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Understanding Your EFI After Endometriosis Surgery<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-3c51559 elementor-widget elementor-widget-text-editor\" data-id=\"3c51559\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>For patients hoping to become pregnant after endometriosis surgery, the EFI provides more information than simply knowing the stage of endometriosis.<\/p><p>A useful question to discuss with your <a href=\"https:\/\/nygse.com\/meet-the-team\/\">endometriosis specialist<\/a> after surgery may be:<\/p><p><strong>\u201cWhat is my Endometriosis Fertility Index?\u201d<\/strong><\/p><p>At <a href=\"https:\/\/nygse.com\/\">New York Gynecology Surgery &amp; Endometriosis (NYGSE)<\/a>, our endometriosis specialists consider surgical findings, reproductive anatomy, fertility history, and each patient&#8217;s individual goals when discussing fertility after endometriosis treatment.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-7f40a6e9 elementor-section-content-middle elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"7f40a6e9\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-no\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-33 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elementor-element-custom_line_height elementor-element-custom_font_weight elementor-element elementor-element-1f906024 elementor-widget elementor-widget-text-editor\" data-id=\"1f906024\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span style=\"color: #31609f;\"><a href=\"tel:631-533-9733\" style=\"color: #31609f;\">+631 533 9733<\/a><\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t<div class=\"elementor-element elementor-element-1fc5f76 e-flex e-con-boxed e-con e-parent\" data-id=\"1fc5f76\" data-element_type=\"container\" data-e-type=\"container\" id=\"references\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7e2401fc elementor-widget elementor-widget-heading\" data-id=\"7e2401fc\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h5 class=\"elementor-heading-title elementor-size-default\">References<\/h5>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element-custom_font_size elementor-element elementor-element-14158302 elementor-widget elementor-widget-text-editor\" data-id=\"14158302\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ol><li>Adamson, G. D., &amp; Pasta, D. J. (2010). Endometriosis fertility index: The new, validated endometriosis staging system. <em>Fertility and Sterility, 94<\/em>(5), 1609\u20131615. <a href=\"https:\/\/doi.org\/10.1016\/j.fertnstert.2009.09.035\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">https:\/\/doi.org\/10.1016\/j.fertnstert.2009.09.035<\/a><\/li><li>Becker, C. M., Bokor, A., Heikinheimo, O., Horne, A., Jansen, F., Kiesel, L., King, K., Kvaskoff, M., Nap, A., Petersen, K., Saridogan, E., Tomassetti, C., van Hanegem, N., Vulliemoz, N., &amp; Vermeulen, N. (2022). ESHRE guideline: Endometriosis. <em>Human Reproduction Open, 2022<\/em>(2), hoac009. <a href=\"https:\/\/doi.org\/10.1093\/hropen\/hoac009\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">https:\/\/doi.org\/10.1093\/hropen\/hoac009<\/a><\/li><\/ol>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>The Endometriosis Fertility Index (EFI) helps estimate fertility potential after endometriosis surgery. Learn how the score is calculated and what it may mean for fertility planning.<\/p>","protected":false},"author":12,"featured_media":11942,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[69],"tags":[],"class_list":["post-11939","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-endometriosis"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Endometriosis Fertility Index (EFI) Explained | NYGSE<\/title>\n<meta name=\"description\" content=\"Learn how the Endometriosis Fertility Index (EFI) is calculated and how it can help estimate fertility potential after endometriosis surgery.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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