Introduction

Infertility, defined as the inability to achieve pregnancy after 12 months of regular unprotected sexual intercourse, is a significant global health issue affecting approximately 10–15% of couples of reproductive age [1]. While infertility encompasses both male and female factors [2], women frequently experience a disproportionate burden of social, emotional, and psychological consequences, particularly in societies where cultural norms tie reproductive capacity to marital status [3]. Within this context, unmarried women constitute a unique and often understudied population, facing distinct challenges in accessing infertility screening and care. These challenges are compounded by societal stigma, legal restrictions, and limited healthcare resources, which may delay diagnosis and exacerbate reproductive health disparities [4].

In females, the primary focus of infertility screening is on assessing ovarian reserve and uterine health. Infertility screening involves clinical assessments, hormonal assays (e.g., FSH, LH, AMH), and imaging techniques (e.g., pelvic ultrasonography) to evaluate reproductive status [5]. In specific cases, advanced procedures such as hysteroscopy or laparoscopy may be employed [6]. These measures collectively facilitate the identification of infertility etiologies and guide subsequent therapeutic interventions.

The importance of infertility screening for unmarried women is increasingly recognized, yet significant barriers persist [7]. Societal perceptions often frame fertility concerns as relevant only to married individuals, marginalizing unmarried women who seek reproductive health services [4,8]. This stigma may deter timely screening, potentially leading to poorer health outcomes due to delayed identification of treatable conditions such as tubal factor infertility or ovulatory dysfunction [9–11]. Furthermore, unmarried women may encounter structural obstacles, including lack of partner involvement, financial constraints, and restrictive policies governing access to fertility treatment [12,13].

Guidelines concerning fertility screening and counseling are limited [7]. Despite these considerations, based on our knowledge the current literature lacks a synthesis of evidence specific to infertility screening in unmarried women. This gap hinders the development of targeted guidelines and equitable healthcare policies. To address this, the present scoping review protocol outlines a structured approach to map existing research, identify knowledge gaps, and elucidate key concepts related to infertility screening in this population.

Objectives

Review question

What is the current state of knowledge regarding infertility screening in unmarried women?

Inclusion and exclusion criteria

Study eligibility was determined using the PCCT framework, detailed in Table 1.

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Table 1. PCCT framework.

https://doi.org/10.1371/journal.pone.0329899.t001

Inclusion and exclusion criteria may be refined iteratively. Machine translation ensured language inclusivity. The search covered publications from inception to May 31, 2025.

Methods and analysis

This scoping review, following PRISMA-P (protocol) (S1 Checklist) [14] and PRISMA-ScR (reporting) [15] guidelines, utilizes a 14-step framework. This framework, based on Arksey and O’Malley’s [16] methodology and incorporating improvements by Tricco and Peters [17,18], includes: protocol development, question/objectives formulation, eligibility criteria definition, literature search (in resources, reference lists and grey literature), which will be informed by engagement with key stakeholders to refine the search strategy and identify relevant grey literature, study screen, study selection, design and perform data charting, results and flowchart presentation, and identification of research and practical implications.

Study records

Data management.

Retrieved records will be managed in HubMeta [20], with duplicates removed. Two independent reviewers will screen titles and abstracts, followed by full-text review of potentially eligible articles.

Selection process.

Study selection will involves two phases: title/abstract screening and full-text review against pre-defined criteria. Disagreements will resolve by consensus or a third reviewer. A PRISMA flowchart (Fig 1) will detail the process. Authors will be contacted for missing data. Inter-rater reliability (Kappa) will be calculated.

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Fig 1. PRISMA flowchart.

https://doi.org/10.1371/journal.pone.0329899.g001

Data collection and analysis.

Two independent extractors will thoroughly review the full text of each study that meets the inclusion criteria using a standardized data charting form. This form, developed and piloted by the research team, aligns with the PCCT framework and the objectives of the scoping review.

It will systematically capture key study characteristics, including authors, publication year, study design, country, and language. Additionally, participant characteristics such as age range, subgroups, recruitment methods, sample size, and contextual details will be documented. The form will also address infertility screening details, including the types of methods discussed, motivations for screening. Contextual details will cover the study setting (clinical, community, etc.) and relevant geographical or cultural influences.

The process of data extraction will be iterative, with the form being reviewed and refined based on initial extractions to ensure comprehensive data capture. Any discrepancies between the two extractors will be resolved through discussion, and if necessary, a third reviewer will be consulted. The extracted data will be synthesized into tables and diagrams, accompanied by a narrative summary that highlights key themes, gaps, and the overall scope of research in this area.

S.B. will be contacted for any essential missing information to ensure a complete data synthesis. A rigorous quality assurance process will be implemented to address discrepancies, involving consensus-building with a third researcher to guarantee the accuracy of the data. Finally, the finalized data will be systematically categorized and organized for efficient analysis.

Discussion

This scoping review protocol addresses a critical gap in the literature by outlining a systematic approach to mapping the evidence on infertility screening in unmarried women. By identifying relevant guidelines, mapping screening methods, and synthesizing their advantages and disadvantages, we anticipate that this review will identify key knowledge gaps and inform the development of targeted interventions to improve reproductive health outcomes for this underserved population.

A key strength of this protocol is its adherence to PRISMA-ScR guidelines, ensuring transparency and reproducibility.

This study will provide a critical foundation for future research, policy, and practice related to infertility screening in unmarried women.

Supporting information

Acknowledgments

The authors acknowledge using an AI language model for translation, writing, and editing assistance, retaining full responsibility for the final content.