Definition and research guide
This page combines a MeSH definition, publication statistics and selected research abstracts. It is a starting point for reading the literature, not a medical textbook or a systematic evidence review.
Content available: 4 complete abstracts (909 words), 10 references. Full article text is not stored or reproduced here; follow the PMID, DOI or PMC links to read the original sources and their access terms.
Definition
Abnormal uterine bleeding that is not related to menstruation, usually in females without regular menstrual cycle. The irregular and unpredictable bleeding usually comes from a dysfunctional endometrium.
Definition: NLM Medical Subject Headings (MeSH) scope note (Public domain (U.S. National Library of Medicine); attribution requested). View the MeSH record.
Also known as: Breakthrough Bleeding; Bleeding, Breakthrough; Spotting; Dysfunctional Uterine Bleeding; Dysfunctional Uterine Bleedings; Uterine Bleeding, Dysfunctional; Bleeding Between Periods; Intermenstrual Bleeding.
Where it fits in the MeSH classification
- Broader topics
- Uterine Hemorrhage
Related concepts
Research landscape
PubMed indexes 2,563 records tagged with the MeSH heading “Metrorrhagia” (counts retrieved 2026-11-04). 103 of them (4.0%) were published from 2020 onward, and the busiest period so far is through 1999 with 1,805 records.
Reviews account for 144 records (5.6%) and meta-analyses for 3. Randomized controlled trials number 96 (3.7%) as a share of all records on the topic.
Show the data
| Period | Records |
|---|---|
| through 1999 | 1,805 |
| 2000-2009 | 316 |
| 2010-2019 | 339 |
| 2020 onward | 103 |
Publication-type chart data
| Type | Records | Share |
|---|---|---|
| Reviews | 144 | 5.6% |
| Meta-analyses | 3 | 0.1% |
| Randomized controlled trials | 96 | 3.7% |
Method: PubMed query "Metrorrhagia"[MeSH Terms] with publication-type and date filters, retrieved 2026-11-04.
Reading the evidence in kidney, urology and women's health
Kidney, urinary and reproductive health research uses lab markers (such as creatinine), imaging, symptom scores and registry data on pregnancy and birth. Findings about pregnancy are especially sensitive to who was studied and when in pregnancy exposure occurred. Nothing on this page is advice about treatment, fertility or pregnancy; speak to a qualified clinician. Check the population, the outcome measured and whether the study accounted for other health differences between groups.
Evidence from open-access studies
These open-access studies come from PubMed’s best-match results for this heading (papers whose main topic it is), ranked here by citation count, with one recent addition. Each abstract is reproduced in full under its recorded open licence so that you can read the authors’ own words. They illustrate the literature; they are not a systematic summary of it. Citation counts measure attention, not reliability or clinical benefit.
Abnormal uterine bleeding [1]
Abstract reading summary — source excerpts
- Opening excerpt
- Abnormal uterine bleeding (AUB) is a common and debilitating condition with high direct and indirect costs.
- Closing excerpt
- Treatment must remain individualised and encompass the impact of pressure symptoms, desire for retention of fertility and contraceptive needs, as well as address the management of AUB in order to achieve improved quality of life.
- Interpretation limits
- Verbatim excerpts from the authors’ abstract; the closing excerpt may describe a finding, limitation or recommendation. Design, population, effect size and uncertainty have not been independently extracted or appraised. Read the complete abstract and linked paper before interpreting the findings.
Read complete abstract (162 words)
Abnormal uterine bleeding (AUB) is a common and debilitating condition with high direct and indirect costs. AUB frequently co-exists with fibroids, but the relationship between the two remains incompletely understood and in many women the identification of fibroids may be incidental to a menstrual bleeding complaint. A structured approach for establishing the cause using the Fédération International de Gynécologie et d'Obstétrique (FIGO) PALM-COEIN (Polyp, Adenomyosis, Leiomyoma, Malignancy (and hyperplasia), Coagulopathy, Ovulatory disorders, Endometrial, Iatrogenic and Not otherwise classified) classification system will facilitate accurate diagnosis and inform treatment options. Office hysteroscopy and increasing sophisticated imaging will assist provision of robust evidence for the underlying cause. Increased availability of medical options has expanded the choice for women and many will no longer need to recourse to potentially complicated surgery. Treatment must remain individualised and encompass the impact of pressure symptoms, desire for retention of fertility and contraceptive needs, as well as address the management of AUB in order to achieve improved quality of life.
Abstract reproduced from the open-access article under the recorded cc by licence; © the authors. PMID 26803558 · DOI · PMC4970656
Efficacy and tolerability of a monophasic combined oral contraceptive containing nomegestrol acetate and 17β-oestradiol in a 24/4 regimen, in comparison to an oral contraceptive containing ethinylestradiol and drospirenone in a 21/7 regimen [2]
Abstract reading summary — source excerpts
- Opening excerpt
- ObjectivesThe primary objective was to assess the efficacy, cycle control and tolerability of a monophasic combined oral contraceptive (COC) containing nomegestrol acetate (NOMAC) and 17β-oestradiol (E2).
- Closing excerpt
- ConclusionsThese data show that NOMAC/E2 provides high contraceptive efficacy with acceptable cycle control as well as an overall adverse event profile similar to that of DRSP/EE.
- Interpretation limits
- Verbatim excerpts from the authors’ abstract; the closing excerpt may describe a finding, limitation or recommendation. Design, population, effect size and uncertainty have not been independently extracted or appraised. Read the complete abstract and linked paper before interpreting the findings.
Read complete abstract (168 words)
ObjectivesThe primary objective was to assess the efficacy, cycle control and tolerability of a monophasic combined oral contraceptive (COC) containing nomegestrol acetate (NOMAC) and 17β-oestradiol (E2). Effects on acne were evaluated as a secondary objective. Results were compared to those of a COC containing drospirenone (DRSP) and ethinylestradiol (EE).MethodsWomen (aged 18-50 years) were randomised to receive NOMAC/E2 (2.5 mg/1.5 mg) in a 24/4-day regimen (n=1591) or DRSP/EE (3 mg/30 μg) in a 21/7-day regimen (n=535) for 13 cycles.ResultsEstimated Pearl Indices for NOMAC/E2 and DRSP/EE were 0.38 and 0.81 in women aged≤35 years and 0.31 and 0.66 for all women (18-50 years), respectively. Scheduled withdrawal bleedings were shorter and lighter among users of NOMAC/E2 and were sometimes absent altogether. Intracyclic bleeding/spotting was infrequent in both groups, and decreased over time. Type and frequency of adverse events were similar to those typically reported for COCs.ConclusionsThese data show that NOMAC/E2 provides high contraceptive efficacy with acceptable cycle control as well as an overall adverse event profile similar to that of DRSP/EE.
Abstract reproduced from the open-access article under the recorded cc by licence; © the authors. PMID 21995590 · DOI · PMC3233274
Assessment of Prediagnostic Experiences of Black Women With Endometrial Cancer in the United States [3]
Abstract reading summary — source excerpts
- Opening excerpt
- ImportanceBlack women with endometrial cancer have a 90% higher mortality rate than white women with endometrial cancer.
- Closing excerpt
- Conclusions and relevanceThe responses of interviewed black women with endometrial cancer suggest that several mechanisms may be associated with a delay in care before diagnosis among this high-risk population and represent modifiable factors that may be useful in the development of targeted interventions to improve the rates of early diagnosis among black women with endometrial cancer.
- Interpretation limits
- Verbatim excerpts from the authors’ abstract; the closing excerpt may describe a finding, limitation or recommendation. Design, population, effect size and uncertainty have not been independently extracted or appraised. Read the complete abstract and linked paper before interpreting the findings.
Read complete abstract (356 words)
ImportanceBlack women with endometrial cancer have a 90% higher mortality rate than white women with endometrial cancer. The advanced disease stage at which black women receive a diagnosis of endometrial cancer is a major factor in this disparity and is not explained by differences in health care access.ObjectiveTo describe the prediagnostic experiences of symptoms and symptom disclosure among black women with endometrial cancer.Design, setting, and participantsThis community-engaged qualitative study developed an interview guide to collect data during semistructured interviews among a sample of 15 black women with endometrial cancer in the United States. Interviews were conducted in person or via a secure conferencing platform. An exploratory and descriptive content analysis was performed using iterative rounds of inductive coding, case summaries, and coanalysis with community input to identify emergent themes. Data were collected from October 3, 2017, to April 15, 2019, and the descriptive content analysis was performed from October 11, 2017, to May 6, 2019.Main outcomes and measuresBeliefs, interpretations, and experiences of black women with endometrial cancer from symptom onset to diagnostic confirmation of cancer.ResultsParticipants included 15 women who self-identified as black or African American and ranged in age from 31 to 72 years. Eight participants lived in the Puget Sound region of Washington, 2 participants lived in California, and 1 participant each lived in Alabama, Michigan, Louisiana, Georgia, and New York. Twelve participants were receiving adjuvant therapy during the study, which indicated that they were either in a high-risk group and/or had advanced-stage disease. Thirteen participants had health insurance at the time of symptom onset, and all participants had elected to receive cancer treatment. Participants described knowledge gaps and silence about menopause, misinterpretation of vaginal bleeding, and responses by first-line health care practitioners that were not aligned with the risk of endometrial cancer among black women in the United States.Conclusions and relevanceThe responses of interviewed black women with endometrial cancer suggest that several mechanisms may be associated with a delay in care before diagnosis among this high-risk population and represent modifiable factors that may be useful in the development of targeted interventions to improve the rates of early diagnosis among black women with endometrial cancer.
Abstract reproduced from the open-access article under the recorded cc by licence; © the authors. PMID 32412636 · DOI · PMC7229523
The contradictive findings between ultrasound, hysteroscopy and cytokines in women with nonhormonal IUDs suffering from menorrhagia: a prospective study [4]
Abstract reading summary — source excerpts
- Opening excerpt
- PurposeThe objective of this study is to assess the correlation between bleeding irregularities and the accurate placement of the intrauterine device (IUD) device in the uterine cavity, determined through transvaginal ultrasonography and hysteroscopy.
- Closing excerpt
- The role of local reactive inflammatory cytokines should be further studied.
- Interpretation limits
- Verbatim excerpts from the authors’ abstract; the closing excerpt may describe a finding, limitation or recommendation. Design, population, effect size and uncertainty have not been independently extracted or appraised. Read the complete abstract and linked paper before interpreting the findings.
Read complete abstract (223 words)
PurposeThe objective of this study is to assess the correlation between bleeding irregularities and the accurate placement of the intrauterine device (IUD) device in the uterine cavity, determined through transvaginal ultrasonography and hysteroscopy. In addition, the study aims to examine the cytokine profile in the uterine cavity and serum of patients experiencing bleeding irregularities after the insertion of nonhormonal IUDs.MethodsA prospective cohort study was conducted at a single tertiary medical center, wherein patients experiencing intermenstrual bleeding and spotting after the insertion of nonhormonal IUDs were enrolled. The study involved hysteroscopic and sonographic assessments of the uterine cavity and IUD placement, along with the analysis of blood and uterine cavity cytokine profiles.ResultsDuring the period between July 2019 and February 2020, a total of eight patients who experienced intermenstrual bleeding and spotting after the insertion of nonhormonal IUDs were enrolled the study. One case was excluded since a progestative device was detected by ultrasound. Out of the five cases that underwent a thorough ultrasonographic assessment, three cases (60%) showed an embedded IUD. However, these findings were excluded by the hysteroscopic evaluation.ConclusionThe results suggest that ultrasonographic assessment may lead to an overdiagnosis of IUD mispositioning compared to hysteroscopy. In addition, both ultrasound and hysteroscopy have limitations in diagnosing the cause of bleeding in most cases. The role of local reactive inflammatory cytokines should be further studied.
Abstract reproduced from the open-access article under the recorded cc by licence; © the authors. PMID 38492083 · DOI · PMC11018669
Key reviews and meta-analyses
The most cited review-type papers among PubMed’s best-match results for this heading, listed with bibliographic details only. Follow the links for the full text and access terms.
- Research article A systematic review evaluating health-related quality of life, work impairment, and health-care costs and utilization in abnormal uterine bleeding [5]
- Research article Practice bulletin no. 128: diagnosis of abnormal uterine bleeding in reproductive-aged women [6]
- Research article The medical management of abnormal uterine bleeding in reproductive-aged women [7]
- Research article Minimally invasive therapy for gynaecological symptoms related to a niche in the caesarean scar: a systematic review [8]
- Research article Recommendations for standardization of data collection and analysis of bleeding in combined hormone contraceptive trials [9]
- Research article Cesarean scar defects and abnormal uterine bleeding: a systematic review and meta-analysis [10]
References
- Whitaker L, Critchley HO. Abnormal uterine bleeding. . 2016. PMID 26803558 · DOI · PMC4970656
- Mansour D, Verhoeven C, Sommer W, Weisberg E, Taneepanichskul S, Melis GB, et al.. Efficacy and tolerability of a monophasic combined oral contraceptive containing nomegestrol acetate and 17β-oestradiol in a 24/4 regimen, in comparison to an oral contraceptive containing ethinylestradiol and drospirenone in a 21/7 regimen. . 2011. PMID 21995590 · DOI · PMC3233274
- Doll KM, Hempstead B, Alson J, Sage L, Lavallee D. Assessment of Prediagnostic Experiences of Black Women With Endometrial Cancer in the United States. . 2020. PMID 32412636 · DOI · PMC7229523
- Watad H, Ifrach U, Stockheim D, Yulzari V, Meron OC, Blank M, et al.. The contradictive findings between ultrasound, hysteroscopy and cytokines in women with nonhormonal IUDs suffering from menorrhagia: a prospective study. . 2024. PMID 38492083 · DOI · PMC11018669
- Liu Z, Doan QV, Blumenthal P, Dubois RW. A systematic review evaluating health-related quality of life, work impairment, and health-care costs and utilization in abnormal uterine bleeding. Value Health. 2007. PMID 17532811 · DOI
- Committee on Practice Bulletins—Gynecology. Practice bulletin no. 128: diagnosis of abnormal uterine bleeding in reproductive-aged women. Obstet Gynecol. 2012. PMID 22914421 · DOI
- Bradley LD, Gueye NA. The medical management of abnormal uterine bleeding in reproductive-aged women. Am J Obstet Gynecol. 2016. PMID 26254516 · DOI
- van der Voet LF, Vervoort AJ, Veersema S, BijdeVaate AJ, Brölmann HA, Huirne JA. Minimally invasive therapy for gynaecological symptoms related to a niche in the caesarean scar: a systematic review. BJOG. 2014. PMID 24373589 · DOI
- Mishell DR, Guillebaud J, Westhoff C, Nelson AL, Kaunitz AM, Trussell J, et al.. Recommendations for standardization of data collection and analysis of bleeding in combined hormone contraceptive trials. Contraception. 2007. PMID 17161117 · DOI
- Murji A, Sanders AP, Monteiro I, Haiderbhai S, Matelski J, Walsh C, et al.. Cesarean scar defects and abnormal uterine bleeding: a systematic review and meta-analysis. Fertil Steril. 2022. PMID 35985862 · DOI
About this article
- Sources
- NLM Medical Subject Headings (definition, synonyms); NCBI PubMed (counts, identifiers); Europe PMC (open-access abstracts and citation counts).
- Verification
- Every reference was resolved against PubMed on 2026-11-04; title, year and DOI matched.
- Review state
- automated source verified; no human expert review has been recorded yet.
- Version
- 1, last updated 2026-11-04.
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Evidence strength
EvidenceHelix's computed view of the study designs behind this topic: how common meta-analyses, randomized trials and reviews are, how recent the literature is, and a plain-language reading. It describes the design mix of the literature. It is not a quality appraisal of any study, and it is not medical advice.