Gynecologic and Obstetric Investigation最新文献

{"title":"Cytolytic Vaginosis in Women with Vaginitis: Prevalence, Diagnosis, and Treatment.","authors":"Selda Kömeç, Can Tercan, Ayşe Nur Ceylan, Mehmet Akif Durmuş, Gizem Şirin Donbaloğlu, Mustafa Derya Aydın","doi":"10.1159/000548768","DOIUrl":"https://doi.org/10.1159/000548768","url":null,"abstract":"<p><strong>Objectives: </strong>Vaginitis is an inflammatory condition of the vagina, often manifests with symptoms like discharge, foul odor, and pruritus. The most commonly recognized forms are candidiasis, bacterial vaginosis (BV), and trichomoniasis, but conditions like cytolytic vaginosis (CV) remain under-recognized and frequently misdiagnosed in clinical prac-tice despite its notable prevalence. This study aims to evaluate the prevalence of CV in patients with vaginitis, as-sess the specificity of the diagnostic criteria for CV, and investigate the efficacy of CV treatments.</p><p><strong>Design: </strong>This study is a prospective diagnostic study. Participants/Materials, Setting: A total of 81 patients (aged 20-55) with symptoms of vaginitis, and 30 control participants without these symp-toms were enrolled.</p><p><strong>Methods: </strong>Vaginal samples were analyzed for Trichomonas vaginalis, vulvovaginal candidiasis, and BV, and CV. Vaginal sam-ples were evaluated using Gram staining, pH measurement, and microbiological culture to identify causative agents. CV was diagnosed based on the low vaginal pH, presence of abundant lactobacilli, cytolysis of the vaginal epithelium, false clue cells and naked nuclei in Gram staining.</p><p><strong>Results: </strong>The study found that CV was the most prevalent diagnosis, accounting for 32.1% of cases. This was followed by BV (22.2%) and VVC (14.8%). The most common symptoms among CV patients were vaginal discharge, pruritus, and dysuria. Vaginal discharge characteristics did not significantly distinguish CV from other forms of vaginitis. A recurrence rate of 61.5% was observed in CV patients, highlighting the recurrent nature of the condition. Sodium bicarbonate sitz baths effectively relieved symptoms in many patients (58.8%).</p><p><strong>Limitations: </strong>The number of patients receiving treatment is low, and the treatment follow-ups could have been conducted over a longer period, considering the menstrual cycle.</p><p><strong>Conclusions: </strong>The study highlights the diagnostic challenge of CV, where common symptoms overlap with other forms of vagi-nitis, leading to potential treatment failures. CV treatment, including NaHCO3 sitz baths, showed moderate effi-cacy, but further research is needed to establish more effective therapeutic strategies. Our findings underscore the importance of considering CV in the differential diagnosis of vaginitis, as it remains an overlooked condition that significantly contributes to recurrent vaginitis. Further studies with larger sample sizes and better treatment protocols are needed to enhance the management of this condition.</p>","PeriodicalId":12952,"journal":{"name":"Gynecologic and Obstetric Investigation","volume":" ","pages":"1-13"},"PeriodicalIF":2.3,"publicationDate":"2025-10-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145228435","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Erratum.","authors":"Marta Raposo","doi":"10.1159/000548117","DOIUrl":"https://doi.org/10.1159/000548117","url":null,"abstract":"","PeriodicalId":12952,"journal":{"name":"Gynecologic and Obstetric Investigation","volume":" ","pages":"1"},"PeriodicalIF":2.3,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145174815","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Time Matters: Evaluating the clinical and infectious outcomes in Rupture of Membranes&lt;12 hours vs 12-18 hours, at term: a retrospective study.","authors":"Raneen Abu Shqara, Lior Lowenstein, Maya Frank Wolf","doi":"10.1159/000548662","DOIUrl":"https://doi.org/10.1159/000548662","url":null,"abstract":"&lt;p&gt;&lt;p&gt;Objectives To identify factors associated with intrapartum fever (IPF) and clinical chorioamnionitis in patients with term prelabor rupture of membranes (PROM) lasting &lt;18h and to evaluate microbiological findings in chorioamniotic swab cultures from patients with IPF. Design A retrospective study. Participants/Materials A total of 6,828 patients with term PROM were included and categorized into: PROM &lt;12h (n=5,745) and PROM 12-18h (n=1,083). Exclusion criteria included multiple gestations, fetal anomalies, and incomplete medical records. Setting Galilee Medical Center, a tertiary care hospital, between March 2020 and May 2024. Methods The primary outcome was clinical chorioamnionitis, diagnosed by intrapartum fever ≥38°C and ≥2 clinical signs. Secondary outcomes included maternal (delivery mode, IPF, postpartum complications) and neonatal (Apgar scores, NICU admission, early-onset sepsis) outcomes. Chorioamniotic swabs were obtained from patients with IPF for microbiological analysis. Statistical analysis included chi-square or Fisher's exact tests, Mann-Whitney U tests, relative risks (RRs) with 95% confidence intervals (CIs), and multivariate logistic regression to identify independent predictors of clinical chorioamnionitis and IPF. Results PROM 12-18h was associated with higher rates of clinical chorioamnionitis (3.9% vs. 2.3%, p=0.002; RR 1.73, 95% CI: 1.23-2.45) and IPF (4.8% vs. 2.3%, p&lt;0.001; RR 2.13, 95% CI: 1.34-3.31) compared with PROM &lt;12h. The risk of clinical chorioamnionitis increased progressively with PROM duration, reaching a maximal elevation between 16-18h (aRR 5.23, 95% CI 2.80-9.76, compared with PROM ≤4h). Vaginal delivery was less frequent (76.9% vs. 83.4%, p&lt;0.001), whereas cesarean (16.2% vs. 11.4%, p&lt;0.001) and vacuum-assisted delivery rates (6.9% vs. 5.2%, p=0.029) were higher with PROM 12-18h. Postpartum antibiotic administration was more common (4.1% vs. 1.7%, p&lt;0.001), and postpartum hospitalization was longer (2.4 vs. 2.1 days, p=0.003), respectively. Neonates born after PROM 12-18h had higher rates of NICU admission (4.9% vs. 3.1%, p=0.003), sepsis workups (4.6% vs. 3.0%, p=0.007), and NICU antibiotic treatment (2.9% vs. 1.6%, p=0.003). Multivariate analysis identified parity as protective against chorioamnionitis (OR 0.38, 95% CI: 0.21-0.69, p=0.002) and IPF (OR 0.52, 95% CI: 0.31-0.89, p=0.017). Epidural analgesia increased the odds of IPF (OR 2.20, 95% CI: 1.61-3.90, p=0.048), while meconium-stained amniotic fluid was associated with higher odds of chorioamnionitis (OR 2.86, 95% CI: 1.45-5.63, p=0.002). Positive chorioamniotic swab cultures were more frequent in PROM 12-18h than PROM &lt;12h (59.6% vs. 35.7%, p&lt;0.001; RR 1.71, 95% CI: 1.42-1.91), with higher Enterobacteriaceae detection (26.9% vs. 12.6%, p=0.014, p=0.014). Among GBS-colonized patients, Enterobacteriaceae detection was higher than in GBS-negative patients (32.3% vs. 14.3%, p&lt;0.001), while GBS detection rates were comparable. Limitations The ","PeriodicalId":12952,"journal":{"name":"Gynecologic and Obstetric Investigation","volume":" ","pages":"1-18"},"PeriodicalIF":2.3,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145174790","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Retraction Statement.","authors":"Marta Raposo","doi":"10.1159/000548138","DOIUrl":"10.1159/000548138","url":null,"abstract":"","PeriodicalId":12952,"journal":{"name":"Gynecologic and Obstetric Investigation","volume":" ","pages":"1"},"PeriodicalIF":2.3,"publicationDate":"2025-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145091576","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Comment on \"Diagnostic Accuracy of MRI Using the #Enzian Classification in Endometriosis: A Single-Center Retrospective Cohort Study\".","authors":"Zeeshan Solangi, Rachana Mehta, Ranjana Sah","doi":"10.1159/000548292","DOIUrl":"https://doi.org/10.1159/000548292","url":null,"abstract":"","PeriodicalId":12952,"journal":{"name":"Gynecologic and Obstetric Investigation","volume":" ","pages":"1-6"},"PeriodicalIF":2.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145023137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Does Blastocyst-To-Oocyte Ratio Predict Live Birth When Only One Blastocyst Is Available For Transfer?","authors":"Gurkan Bozdag, Fazilet Kubra Boynukalin, Sinan Ozkavukcu, Meral Gultomruk, Mustafa Bahceci","doi":"10.1159/000548078","DOIUrl":"10.1159/000548078","url":null,"abstract":"<p><strong>Objective: </strong>This study aimed to evaluate whether having only one blastocyst-stage embryo on Day 5/6 rectify the live birth rate (LBR) when various number of oocytes had been collected.</p><p><strong>Design: </strong>A retrospective cohort study from two in vitro fertilization (IVF) centers has been conducted. Participants/Materials: The study included women undergoing IVF treatment whose cycles resulted in only one blastocyst-stage embryo available for frozen transfer on Day 5/6. Cases with no oocyte retrieval, no blastocyst development, or missing clinical data were excluded. There were no restrictions based on female age or BMI to reflect real-world clinical conditions.</p><p><strong>Setting: </strong>A multi-center study was conducted.</p><p><strong>Methods: </strong>This retrospective cohort study included 2,125 single blastocyst frozen embryo transfer cycles performed between November 2018 and February 2023. All patients had only one blastocyst-stage embryo available for transfer on Day 5/6, regardless of the number of oocytes retrieved during controlled ovarian stimulation. Patients were stratified into quartiles based on their blastocyst-to-oocyte ratio. Baseline demographic, ovarian stimulation, and embryological parameters were compared across quartiles. The primary outcome was the LBR. Binary logistic regression was used to identify independent predictors of the LBR, including female age, embryo quality, BMI, and blastocyst-to-oocyte ratio.</p><p><strong>Results: </strong>The mean blastocyst-to-oocyte ratio was 18.6%. Patients in the lowest quartile had significantly younger mean age and higher AMH levels compared to the highest quartile. Although blastocyst development rates increased across quartiles, the LBR was lower in the highest quartile from all other groups (24.5% vs. 31.9 to 29.9%). When the LBR was analyzed as dependent variable, binary logistic regression identified female age (β = 0.93, 95% CI: 0.92-0.95, p < 0.001) and embryo quality (β = 2.35, 95% CI: 1.62-3.39, p < 0.001, compared with moderate-quality embryos; β = 4.22, 95% CI: 2.91-6.11, p < 0.001, compared with poor-quality embryos) as independent predictors. However, the blastocyst-to-oocyte ratio did not demonstrate a significant association with the LBR.</p><p><strong>Limitations: </strong>The retrospective design and absence of genetic testing for embryo ploidy might limit the ability to establish causality. Variability in laboratory conditions and stimulation protocols may also have introduced confounding factors.</p><p><strong>Conclusions: </strong>The blastocyst-to-oocyte ratio does not significantly impact the LBR when only one blastocyst is available for transfer. Instead, female age and embryo quality remain the most critical factors in determining the LBR. These findings emphasize the importance of embryo selection over numerical ovarian response parameters in clinical decision-making to obtain live birth.</p>","PeriodicalId":12952,"journal":{"name":"Gynecologic and Obstetric Investigation","volume":" ","pages":"1-7"},"PeriodicalIF":2.3,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144951828","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of Different Endometrial Preparation Protocols on Pregnancy Outcomes in Women with Polycystic Ovarian Syndrome Undergoing Frozen Embryo Transfer: A Network Meta-Analysis.","authors":"MeiFang Zeng, Hailing Jiang, Baoping Zhu, JinLiang Duan","doi":"10.1159/000547119","DOIUrl":"10.1159/000547119","url":null,"abstract":"<p><strong>Aim: </strong>This study aimed to investigate the impact of various endometrial preparation protocols on pregnancy outcomes in women with polycystic ovarian syndrome (PCOS) undergoing frozen embryo transfer (FET).</p><p><strong>Method: </strong>We conducted a comprehensive search of electronic databases, including PubMed, Embase, and the Cochrane Library, from their inception until February 2024 to identify relevant studies. The network meta-analysis (NMA) was performed using STATA 14.0 software.</p><p><strong>Results: </strong>Seventeen studies met the inclusion criteria, encompassing 16,082 FET cycles (four randomized controlled trials and thirteen observational studies). Women with PCOS undergoing FET using the gonadotropin-releasing hormone agonist (GnRH-a) + hormone replacement therapy (HRT) protocol demonstrated a higher clinical pregnancy rate (CPR) compared to those using HRT alone (OR 1.50, 95% CI: 1.13-1.99). No significant differences were observed in the ongoing pregnancy rate (OPR) and ectopic pregnancy rate among the four examined endometrial preparation protocols (human menopausal gonadotropin [HMG]/follicle-stimulating hormone [FSH], letrozole [LE], HRT, and GnRH-a + HRT). Regarding the miscarriage rate (MR), the LE ovulation induction protocol exhibited a lower MR than the HRT protocol (OR 0.59, 95% CI: 0.46-0.74). The surface under the cumulative ranking curve indicated that the GnRH-a + HRT protocol was the most effective for the CPR. In contrast, the LE ovulation induction protocol was the most effective for minimizing the MR.</p><p><strong>Conclusion: </strong>Our NMA suggests that the GnRH-a + HRT protocol results in a higher CPR compared to the HRT protocol in PCOS women undergoing FET, albeit with a higher risk of miscarriage. While offering comparable CPRs and OPRs to the GnRH-a + HRT protocol, the LE ovulation induction protocol presents a lower MR than the other endometrial preparation protocols.</p>","PeriodicalId":12952,"journal":{"name":"Gynecologic and Obstetric Investigation","volume":" ","pages":"1-13"},"PeriodicalIF":2.3,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144951825","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The Number of Previous Cesarean Deliveries and Severity of Placenta Accreta Spectrum: A Referral Center Experience.","authors":"Neha Agarwal, Edgar A Hernandez-Andrade, Donatella Gerulewicz, Ramesha Papanna, Dejian Lai, Eleazar E Soto Torres, Sarah T Mehl, Elias Kassir, Farah H Amro, Baha M Sibai, Sean C Blackwell","doi":"10.1159/000547755","DOIUrl":"10.1159/000547755","url":null,"abstract":"<p><strong>Objective: </strong>The objective of this study was to evaluate the frequency of severe stages of placenta accreta spectrum (PAS) in relation to the number of previous cesarean deliveries (PCDs).</p><p><strong>Design: </strong>We conducted a retrospective cohort study.</p><p><strong>Setting: </strong>The study was carried out at the University of Texas Health Science Center at Houston (UTHealth), Houston, TX, USA.</p><p><strong>Participants: </strong>A total of 176 patients with histopathologically confirmed PAS were included in the study. The frequency of each stage of PAS severity was analyzed in relation to the number of PCDs Methods: Differences in the frequency of different stages of PAS severity among patients with varying numbers of PCDs were estimated. Adjusted logistic regression models were used to evaluate the association between the number of PCDs and PAS severity.</p><p><strong>Results: </strong>In our referral center, the frequency of placenta accreta was 18.1% (n = 32/176), placenta increta 55.6% (n = 98/176), and placenta percreta 26.1% (n = 46/176). There were 8 patients with no PCDs, 48 with 1 PCD, 62 with 2 PCDs, and 58 with ≥3 PCDs. The frequency of placenta increta was similar among all PCDs groups; however, the frequency of placenta percreta was significantly higher among women with ≥3 PCDs (25/58 [43.1%]) as compared to those with ≤2 PCDs (21/118 [17.7%], aOR, 3.49 [95% confidence interval, 1.73-7.05]; p = 0.005). Patients with no PCDs had a higher frequency of placenta accreta and a similar frequency of placenta increta to those with a history of PCDs.</p><p><strong>Limitations: </strong>The study was conducted at a single center with a high referral rate for severe forms of PAS, which may restrict the generalizability of the findings. Additionally, the classification of PAS relies heavily on histopathologic interpretation, which can introduce potential biases depending on provider experience and the criteria used.</p><p><strong>Conclusion: </strong>The frequency placenta increta was similar among women with the suspicion of PAS regardless of the number of PCDs. Women with ≥3 PCDs had a significantly higher frequency of placenta percreta.</p>","PeriodicalId":12952,"journal":{"name":"Gynecologic and Obstetric Investigation","volume":" ","pages":"1-7"},"PeriodicalIF":2.3,"publicationDate":"2025-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144816472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Prognostic Impact of Estrogen and Progesterone Receptor Expression across Histological Subtypes and Clinical Factors in Epithelial Ovarian Cancer.","authors":"Khayal Gasimli, Alice Melodie Wilke, Iryna Schmeil, Bahar Gasimli, Thomas Karn, Sven Becker, Ruza Arsenic, Ahmed El-Balat","doi":"10.1159/000547773","DOIUrl":"10.1159/000547773","url":null,"abstract":"<p><strong>Objective: </strong>Epidemiological and in vitro studies of epithelial ovarian cancer (OC) strongly suggest a link between hormone receptor (HR) expression, tumorigenesis, and survival. Antihormonal therapies have shown antitumor activity in OC, both alone and combined with other treatments. The primary objective of this study was to examine the expression patterns of estrogen- and progesterone receptors (ER and PR) in OC across different histological subtypes and assess their prognostic value in disease progression.</p><p><strong>Design: </strong>Retrospective analysis of data from 164 patients who received primary treatment at University Hospital Frankfurt between January 1999 and December 2019.</p><p><strong>Materials, setting, methods: </strong>The expression of both HRs was determined through immunostaining of tissue samples and evaluated using the immunoreactive score (IRS) according to Remmele and Stegner. Correlation and survival analyses evaluated the prognostic and predictive significance of HR expression.</p><p><strong>Results: </strong>The correlation between ER and PR expression with histological subtypes was significant (p = 0.002 and p = 0.013, respectively). Strong ER and PR expression was more common in HGSC, low-grade serous carcinoma, and EC, while low PR expression was linked to higher tumor grading (p = 0.032). Notably, clear cell carcinoma patients with weak PR expression had better survival rates than those with strong PR expression (p = 0.025). The difference in overall survival (OS) between ER-positive and ER-negative patients was minimal (55 vs. 51 months; p = 0.906). Median progression-free survival (PFS) and OS were slightly better in cases with weak PR expression (24 and 58 months) compared to strong PR expression (19 and 53 months; p = 0.797 and p = 0.45, respectively). In cases with strong ER expression and suboptimal debulking (TR >1 cm), disease recurrence was delayed (median PFS: 8 vs. 14 months; p = 0.038), a difference not seen after optimal debulking or in overall OS.</p><p><strong>Limitations: </strong>This single-center, retrospective study limits generalizability. We could not distinguish PR isoforms or assess ER/PR ratios or interactions, limiting molecular insight.</p><p><strong>Conclusion: </strong>ER and PR expression did not demonstrate a significant overall impact on survival in the entire cohort. However, the expression patterns and associated prognosis of ER and PR differed significantly depending on histological subtypes and clinical factors.</p>","PeriodicalId":12952,"journal":{"name":"Gynecologic and Obstetric Investigation","volume":" ","pages":"1-15"},"PeriodicalIF":2.3,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144784185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Low-Dose Aspirin and Prevention of Spontaneous Preterm Birth: Is It Worthwhile? A Systematic Review and Meta-Analysis.","authors":"Ana Luísa Areia, Miguel Areia, Anabela Mota-Pinto","doi":"10.1159/000546964","DOIUrl":"10.1159/000546964","url":null,"abstract":"<p><strong>Introduction: </strong>Due to its anti-inflammatory properties, low-dose aspirin (LDA) has been theorized to mitigate spontaneous preterm birth (PTB). This systematic review and meta-analysis aims to report the available evidence to determine whether LDA administration prevents any spontaneous PTB.</p><p><strong>Methods: </strong>Embase, PubMed, Scopus, Cochrane Central Register, and Web of Science databases were searched, and the protocol was registered within the PROSPERO database (CRD42021288021). Data were examined using Review Manager 5.4 Software.</p><p><strong>Results: </strong>The search yielded 261 relevant articles, from which 11 pertinent studies were included in this meta-analysis. While LDA showed a reduction of spontaneous PTB rates (odds ratio [OR] 0.93; 95% confidence interval [CI] 0.84-1.04), the results lacked statistical significance. Nevertheless, LDA significantly reduced the rate of spontaneous PTB <34 weeks (6 studies; OR 0.85; 95% CI 0.78-0.93). Also, subgroup analysis of high-risk women (OR 0.96; 95% CI 0.78-1.17) and healthy women (OR 0.91; 95% CI 0.79-1.04) showed that LDA had a non-significant trend to reduce spontaneous PTB rates. Moreover, there was a statistically significant reduction in spontaneous PTB when LDA administration was initiated before 16 weeks (5 studies; OR 0.91; 95% CI 0.83-0.98), although not for LDA dosages below 100 mg (9 studies; OR 0.97; 95% CI 0.91-1.03).</p><p><strong>Conclusion: </strong>This meta-analysis indicates a statistically significant reduction in spontaneous PTB rates associated with LDA administration only in spontaneous PTB pregnancies before 34 weeks (not any spontaneous PTB) and for LDA administration starting before 16 weeks. Although LDA can potentially prevent any spontaneous PTB, further well-conducted trials focussing specifically on this subgroup are warranted to provide robust evidence of its efficacy.</p>","PeriodicalId":12952,"journal":{"name":"Gynecologic and Obstetric Investigation","volume":" ","pages":"1-9"},"PeriodicalIF":2.3,"publicationDate":"2025-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144690043","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}