Paper Microfluidic Pregnancy Test Using Cattle Dung Biomarkers
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Solution Overview
Problem
Current methods for detecting pregnancy in cattle and buffaloes are invasive, require veterinary expertise, and are not cost-effective, making it difficult for small-scale farmers to manage reproduction and maximize milk production.
Innovation Solution
A non-invasive, affordable paper-based kit for detecting progesterone metabolite 5α-pregnan-3α-ol-20-one in dung samples using a microfluidic device with patterned hydrophilic and hydrophobic layers, enabling early pregnancy detection through colorimetric analysis.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional pregnancy detection methods (ultrasonography, blood sampling) are used, then detection accuracy is improved, but device complexity and cost increase
Solution Approach 1:
The patent employs disposable paper-based microfluidic devices that integrate multiple detection functions into a single-use cartridge. This eliminates the need for expensive, complex laboratory equipment while maintaining detection accuracy through carefully designed paper structures that guide fluid flow and enable colorimetric readings.
Solution Approach 2:
The patent introduces paper-based microfluidic devices as an intermediary between complex laboratory equipment and simple field conditions. These devices translate complex immunoassay procedures into user-friendly formats that farmers can operate without technical expertise, bridging the gap between laboratory-grade detection and field accessibility.
2Measurement precision
If veterinary expertise is required for pregnancy detection, then measurement precision is improved, but ease of operation deteriorates
Solution Approach 1:
The patent designs self-contained microfluidic devices that automatically guide sample processing through integrated fluid channels and reaction zones. The devices require no external equipment or specialized knowledge - farmers simply collect dung samples and follow simple instructions, with the device handling all complex steps autonomously.
Solution Approach 2:
The patent divides the complex detection process into discrete, manageable steps: sample collection, reagent addition, incubation, and reading. Each step is designed to be independent and straightforward, eliminating the need for continuous veterinary supervision while maintaining detection accuracy.
3Measurement precision
If sophisticated laboratory infrastructure is used, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent replaces expensive, sophisticated laboratory infrastructure with disposable paper-based devices that can be manufactured at low cost. The paper substrates, reagents, and microfluidic structures are all designed for single-use production through simple manufacturing processes, eliminating the need for costly laboratory equipment.
Solution Approach 2:
The patent transitions detection parameters from laboratory-optimized conditions to field-appropriate conditions. The assay is redesigned to work at room temperature, with simplified buffer compositions and extended incubation times that accommodate field environments, while maintaining detection sensitivity through optimized antibody concentrations and substrate formulations.
4Reliability
If pregnancy detection is delayed until 3-4 months, then reliability of traditional methods is improved, but loss of time increases
Solution Approach 1:
The patent enables preliminary pregnancy detection at 4-6 weeks by detecting progesterone metabolites in dung samples, allowing farmers to identify pregnant animals much earlier than traditional methods. This early detection provides sufficient time for pregnancy management decisions while maintaining reliability through validated immunoassay techniques.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The kit allows for early pregnancy detection in cattle and buffaloes within 4-6 weeks with high accuracy, being user-friendly, inexpensive, and not requiring specialized equipment, thus benefiting small-scale farmers.
Implementation Method 1
at least one patterned, porous and hydrophilic layer patterned with wax outlining patterns to create hydrophobic barriers
Implementation Method 2
said device is configured for detecting 5α-pregnan-3α-ol-20-one antigen at a concentration greater than 400 nanograms per gram in the biological sample
Data Source
AI summary
The present invention discloses a kit and a novel method of extraction of a progesterone metabolite from feces/dung sample. The present invention also discloses a paper-based microfluidic device for detection of the progesterone metabolite for early determination of pregnancy in cattle and buffaloes. The invention further discloses antibodies developed against said metabolite, method of extraction, methods for fabricating the paper-based microfluidic devices and methods for inexpensive, rapid and non-invasive determination of pregnancy in early stages in cattle and buffaloes.