pH-Sensitive Strip for Non-Invasive Ovulation Detection

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Solution Overview

Problem

Existing family planning methods for women are often invasive, stigmatized, and inaccessible, particularly in rural areas, and fail to empower women with control over their reproductive health due to affordability and social constraints, lacking awareness of their ovulation cycles.

Innovation Solution

A non-invasive, disposable pH-sensitive strip or solution that changes color when attached to the crotch panel of underwear, indicating the shift from acidic to neutral-basic vaginal discharge during ovulation, allowing women to track their fertility window without requiring conscious effort or smartphone access.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If traditional contraception methods (condoms, IUDs, birth control pills) are used, then family planning control is achieved, but women's autonomy and comfort are reduced due to male-dependency, invasiveness, and stigma

Engineering Contradiction:

Improvefamily planning controlVSAvoidwomen's autonomy and comfort

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The pH strip enables women to independently monitor their own fertility status without requiring male participation or medical intervention. The strip is self-applied to the crotch panel and automatically detects pH changes, allowing women to take control of their reproductive decisions autonomously

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The patent replaces mechanical/intrusive contraceptive methods (IUD insertion, pill ingestion) with a chemical sensing approach using pH-sensitive indicators that passively detect physiological changes through color change, eliminating the need for physical intervention in the body

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Loss of information

If modern family planning methods (mobile applications, period trackers) are used, then cycle tracking capability is improved, but accessibility is reduced due to requirement of smartphone ownership and urban infrastructure

Engineering Contradiction:

Improvecycle tracking capabilityVSAvoidaccessibility across different socioeconomic contexts

Core Design Contradiction:

Loss of informationVSAdaptability or versatility

Solution Approach 1:

The pH strip is designed as a low-cost, disposable product that can be manufactured and distributed widely without requiring expensive infrastructure. Each strip is single-use but extremely affordable, making it accessible to women in rural and low-income settings who cannot access smartphones or medical facilities

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Solution Approach 2:

The patent extracts the essential function of cycle tracking from complex digital systems (smartphone applications requiring internet connectivity) and implements it through a simple chemical indicator strip that works independently of any electronic infrastructure

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If invasive contraceptive methods (IUDs, birth control pills) are used, then hormonal control is achieved, but side effects and discomfort increase

Engineering Contradiction:

Improvecontraception effectivenessVSAvoidside effects and discomfort

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent converts the naturally occurring pH change in vaginal discharge during ovulation (which was previously just a physiological phenomenon) into a useful indicator for fertility detection. Instead of suppressing natural bodily functions through hormones, the method leverages natural pH fluctuations for beneficial family planning purposes

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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

Enables women to make informed decisions about family planning by providing a user-friendly, affordable, and stigma-free method to detect ovulation, promoting reproductive health awareness and empowerment.

Implementation Method 1

It consists of a pH sensitive solution that can indicate a woman's (the intended end-user) fertility window

Methodology Applied

Scientific EffectpH sensitivity:

Implementation Method 2

receive feedback through the change, or lack thereof, in the color of the strip or solution. A change in the color will inform the user that the pH value of the vaginal discharge has increased

Methodology Applied

Scientific EffectColor change:

Data Source

PatentUS20240237972A1Self-Diagnostic Ovulation Tool

Publication Date: 2024.07.18 TEWARI KHYATEE

AI summary

A user-friendly, non-invasive method for swift screening of vaginal discharge to identify the fertility window by placing or attaching a pH sensitive strip or solution on the crotch panel of the user's underwear. The purpose of the pH sensitive strip is to allow the user to monitor her ovulation cycle in order to inform household decisions related to prevention or promotion of pregnancy.