Modified Amniotic Fluid Score With Fetal Bladder Assessment

Modified Amniotic Fluid Scoring Model Incorporating Fetal Bladder Assessment

This study will prospectively enroll pregnant women with singleton pregnancies between 20 and 38 weeks of gestation who attend Assiut University Hospital for routine or indicated ultrasound assessment of amniotic fluid. The aim is to develop and validate a modified amniotic fluid scoring model that combines standard ultrasound measures of amniotic fluid volume with fetal bladder size and appearance. The study will compare the ability of this new scoring model to detect abnormal amniotic fluid volume against conventional ultrasound methods and will explore how fetal bladder measurements relate to amniotic fluid indices.

Study Overview

• Status: Not yet recruiting
• Conditions: Amniotic Fluid Scoring Model; Fetal Bladder Assessment

Detailed Description

This prospective observational cohort study will be conducted in the Obstetrics and Gynecology Department at Assiut University Hospital and will enroll 70 pregnant women aged 18-45 years with singleton pregnancies between 20 and 38 weeks of gestation who are referred for routine or clinically indicated ultrasound assessment of amniotic fluid volume. The study aims to develop and validate a modified amniotic fluid scoring model that integrates standard sonographic measures of amniotic fluid volume, including the amniotic fluid index and single deepest pocket, with predefined fetal bladder parameters such as bladder presence, morphology, and longitudinal and transverse diameters measured at maximal filling.

Eligible participants will undergo a standardized ultrasound examination using a high-resolution machine with a curvilinear transducer; the uterus will be systematically scanned to obtain AFI and single deepest pocket measurements, followed by a dedicated five-minute assessment of the fetal bladder to document its size, appearance, and any observed micturition events. All sonographic assessments will be performed by experienced sonographers following uniform protocols, and approximately 10 percent of examinations will be re-scanned by a second sonographer to assess interobserver reliability, with images and measurements digitally archived for blinded review.

• Study Type: Observational
• Enrollment (Estimated): 70

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult
• Accepts Healthy Volunteers: N/A

• Sampling Method: Non-Probability Sample

Study Population

Pregnant women aged 18-45 years with singleton pregnancies between 20 and 38 weeks of gestation attending the Obstetrics and Gynecology Department at Assiut University Hospital for routine or indicated ultrasound assessment of amniotic fluid volume.

Description

Inclusion Criteria:

• Pregnant women aged 18-45 years.
• Singleton pregnancy between 20 and 38 weeks of gestation.
• Women attending Assiut University Hospital for routine or indicated ultrasound assessment of amniotic fluid volume.
• No known major fetal anomalies at the time of inclusion.
• Able and willing to provide written informed consent.

Exclusion Criteria:

• Multiple pregnancy (e.g., twins, triplets).
• Pregnancies with known chromosomal or major structural fetal anomalies diagnosed prior to enrollment.
• Maternal systemic diseases known to affect amniotic fluid volume (e.g., pregestational or gestational diabetes, chronic hypertension, renal disease).
• Contraindications to ultrasound examination.
• Inability to provide informed consent or anticipated poor compliance with study procedures.

Study Plan

How is the study designed?

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Sensitivity Of The Modified Amniotic Fluid Scoring Model	Proportion of pregnancies with abnormal amniotic fluid volume (oligohydramnios or polyhydramnios) correctly identified as abnormal by the modified amniotic fluid scoring model incorporating fetal bladder assessment, using conventional ultrasound assessment (AFI/SDP) as the reference standard.	At the index obstetric ultrasound examination during pregnancy (single visit per participant).

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Correlation Between Fetal Bladder Size And Amniotic Fluid Volume	Correlation coefficient between fetal bladder dimensions (longitudinal and transverse diameters measured at maximal filling) and amniotic fluid volume indices (AFI and single deepest pocket) to assess the relationship between bladder size and amniotic fluid volume.	At the same index obstetric ultrasound examination during pregnancy (single visit per participant).

Collaborators and Investigators

• Sponsor: Assiut University

Study record dates

Study Major Dates

• Study Start (Estimated): January 1, 2026
• Primary Completion (Estimated): January 1, 2027
• Study Completion (Estimated): February 1, 2027

Study Registration Dates

• First Submitted: December 18, 2025
• First Submitted That Met QC Criteria: December 18, 2025
• First Posted (Estimated): January 2, 2026

Study Record Updates

• Last Update Posted (Estimated): January 2, 2026
• Last Update Submitted That Met QC Criteria: December 18, 2025
• Last Verified: December 1, 2025

More Information

Terms related to this study

• Keywords: Modified Amniotic Fluid Scoring Model; Fetal Bladder Assessment
• Other Study ID Numbers: Modified Amniotic Fluid Score