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Defines PUL, explains discriminatory HCG thresholds and expected HCG kinetics, and outlines scanning and management steps based on initial HCG level, ultrasound findings, and symptoms. Includes outcomes, recommendations for transabdominal and transvaginal scanning, and escalation for possible ectopic pregnancy and persistent PUL.",{"@graph":63,"@context":112},[64,80,95],{"@type":65,"itemListElement":66},"BreadcrumbList",[67,71,74,77],{"item":68,"name":69,"@type":70,"position":9},"https://docshare.wps.com","Home","ListItem",{"item":72,"name":10,"@type":70,"position":73},"https://docshare.wps.com/template/",2,{"item":75,"name":36,"@type":70,"position":76},"https://docshare.wps.com/template/forms/",3,{"item":78,"name":59,"@type":70,"position":79},"https://docshare.wps.com/template/hcg-tracking-for-pregnancy-of-unknown-location-pul-clinical-guideline/565483/",4,{"url":78,"name":59,"@type":81,"author":82,"headline":59,"publisher":85,"fileFormat":88,"inLanguage":57,"description":61,"dateModified":89,"datePublished":89,"encodingFormat":88,"isAccessibleForFree":90,"interactionStatistic":91},"DigitalDocument",{"name":83,"@type":84},"Indoniesian Boy","Person",{"url":68,"name":86,"@type":87},"DocShare","Organization","application/pdf","2026-10-13",true,{"@type":92,"interactionType":93,"userInteractionCount":4},"InteractionCounter",{"@type":94},"ViewAction",{"@type":96,"mainEntity":97},"FAQPage",[98,104,108],{"name":99,"@type":100,"acceptedAnswer":101},"What does PUL mean and why is it clinically important?","Question",{"text":102,"@type":103},"PUL describes cases with a positive pregnancy test but no sign of pregnancy inside or outside the uterus. It can be an ectopic pregnancy until the location is determined, so HCG tracking and appropriate ultrasound follow-up are essential.","Answer",{"name":105,"@type":100,"acceptedAnswer":106},"What is the discriminatory HCG level used for ultrasound detection?",{"text":107,"@type":103},"A discriminatory level of 1500 iu/I has been agreed, representing the serum threshold above which an intrauterine gestational sac should be detectable by ultrasound.",{"name":109,"@type":100,"acceptedAnswer":110},"How should management change based on initial HCG level?",{"text":111,"@type":103},"For initial HCG ≥ 1500 iu/l with history not strongly suggesting complete miscarriage, repeat transvaginal scan and consider medical or surgical management if ectopic findings are present. For initial HCG ≥ 25 and \u003C 1500 iu/l, review condition, repeat HCG after 48 hours, and manage as outpatient if clinically well; for HCG \u003C 25, discharge with advice if asymptomatic.","https://schema.org",{"og:url":78,"og:type":114,"og:title":59,"og:site_name":86,"og:description":61},"article",{"robots":116,"canonical":78},"index,follow",{"doc_id":118,"site_id":56},565483,1791854805,{"code":4,"msg":5,"data":121},{"doc_id":118,"user_id":122,"nickname":83,"user_avatar":123,"doc_module":9,"category_id":35,"category_name":36,"doc_title":59,"doc_description":61,"doc_content":124,"file_id":125,"file_url":126,"file_type":127,"file_size":128,"view_count":4,"is_deleted":4,"is_public":9,"is_downloadable":9,"audit_status":9,"page_count":129,"language":130,"language_code":57,"site_id":56,"html_lang":57,"table_of_contents":131,"faqs":132,"seo_title":133,"seo_description":61,"update_tm":119,"read_time":73},962090760608,"https://ap-avatar.wpscdn.com/davatar_276721f389ce27ea32af1340a28f341c","CLINICAL GUIDELINE  \nHCG tracking for Pregnancy of Unknown Location (PUL)  \nA guideline is intended to assist healthcare professionals in the choice of disease-specific treatments.  \nClinical judgement should be exercised on the applicability of any guideline, influenced by individual patient characteristics. Clinicians should be mindful of the potential for harmful polypharmacy and increased susceptibility to adverse drug reactions in patients with multiple morbidities or frailty.  \nIf, after discussion with the patient or carer, there are good reasons for not following a guideline, it is good practice to record these and communicate them to others involved in the care of the patient.  \n\n| Version Number: | 2 |\n| --- | --- |\n| Does this version include changes to clinical advice: | No |\n| Date Approved: | 15th November 2023 |\n| Date of Next Review: | 30th November 2026 |\n| Lead Author: | Lynne Thomson |\n| Approval Group: | Gynaecology Clinical Governance Group |\n\nImportant Note:  \nThe Intranet version of this document is the only version that is maintained.  \nAny printed copies should therefore be viewed as ‘Uncontrolled’ and as such, may not necessarily contain the latest updates and amendments.  \nGG&C Early Pregnancy Guidelines  \nHCG tracking for pregnancy of unknown location (PUL)  \nObjective  \nThis protocol is designed for use within the Early Pregnancy Assessment Service. The objective is to create safe management for women presenting with a positive pregnancy test and no evidence of intrauterine pregnancy (IUP)  \nIt explains  \n• When to perform ultrasound  \n• How to interpret results  \nPregnancy of unknown location  \n• PUL is used to describe cases where there is a positive pregnancy test but no sign of a pregnancy inside or outside the uterus.  \n• PUL could be an ectopic pregnancy until location determined.  \n• Serum levels of HCG are used to help determine management of the pregnancy.  \n• In normal pregnancy, serum HCG levels increase by 63% every 48 hours.  \n• Around 70 % of women with an ectopic pregnancy will have a rise in HCG that is slower than normal for a normal pregnancy or a fall that is lower than normal for a spontaneous miscarriage but 13% of ectopic of pregnancies will have a normal doubling time.  \n• 15 % of patients with a normal pregnancy will have an abnormal doubling time – which can make it difficult to differentiate between a normal pregnancy, a miscarriage and an ectopic pregnancy.  \n• The discriminatory zone is a serum level that corresponds to the threshold above which an intrauterine gestational sac should be detectable by ultrasound. A discriminatory level of 1500 iu/I has been agreed.  \n• In multiple pregnancies, the HCG level will be slightly higher, requiring an extra 2-3 days for a sac to become visible.  \n• Women with presumed complete miscarriage should be treated as PUL and have HCG tracking.  \n• Place more importance on the clinical symptoms than on serum HCG levels and review the woman’s condition if any of her symptoms change – an ectopic pregnancy can rupture with a HCG ≤ 1000 iu/l.  \n• The patient should be given written information about what to do if they experience any new or worsening symptoms including details about how to access emergency care 24 hours per day.  \nOutcome of PUL  \n1. Disappearance of pregnancy-miscarriage or resolved ectopic.  \n2. Progression to confirmation of normal intrauterine pregnancy.  \n3. Ectopic pregnancy  \n4. Persistent PUL (2%)  \nScanning recommendations  \n1. A transabdominal scan should be performed in the first instance to exclude pelvic pathology  \n2. Where trans-abdominal scan has failed to confirm an intra uterine pregnancy, a transvaginal scan should be performed.  \n3. When the location of the pregnancy is not confirmed on transvaginal scan HCG tracking should be commenced.  \n4. If an intrauterine sac with yolk sac is demonstrated, HCG tracking is not required.  \nInitial HCG ≥ 1500 iu/l and the clinical history is not strongly suggestive of c","cbCaihcEsFjKUEX8","https://ap.wps.com/l/cbCaihcEsFjKUEX8","pdf",309925,6,"English","# Objective\n## Pregnancy of unknown location (PUL)\n## Outcome of PUL\n# Scanning recommendations\n## Initial HCG ≥ 1500 iu/l\n## Initial HCG ≥ 25 and \u003C 1500 iu/l\n## Initial HCG \u003C 25 iu/l\n## Appropriate increase of 63% but HCG \u003C1500 iu/l\n## Inappropriate increase/decrease or plateauing pattern\n## Appropriate decrease by at least 50%","[{\"question\":\"What does PUL mean and why is it clinically important?\",\"answer\":\"PUL describes cases with a positive pregnancy test but no sign of pregnancy inside or outside the uterus. It can be an ectopic pregnancy until the location is determined, so HCG tracking and appropriate ultrasound follow-up are essential.\"},{\"question\":\"What is the discriminatory HCG level used for ultrasound detection?\",\"answer\":\"A discriminatory level of 1500 iu/I has been agreed, representing the serum threshold above which an intrauterine gestational sac should be detectable by ultrasound.\"},{\"question\":\"How should management change based on initial HCG level?\",\"answer\":\"For initial HCG ≥ 1500 iu/l with history not strongly suggesting complete miscarriage, repeat transvaginal scan and consider medical or surgical management if ectopic findings are present. For initial HCG ≥ 25 and \\u003c 1500 iu/l, review condition, repeat HCG after 48 hours, and manage as outpatient if clinically well; for HCG \\u003c 25, discharge with advice if asymptomatic.\"}]","HCG tracking for Pregnancy of Unknown Location (PUL) - Clinical guideline | PDF"]