About KNOWHEN®

Empowering Women

Through Natural Fertility Awareness

Every breakthrough begins with a story. For KNOWHEN®, it started with our founder Helen Denise’s personal journey through an ectopic pregnancy in the early 2000s. This life-altering experience transformed her mission in life—from a successful career woman to a passionate advocate for women’s fertility awareness and health education.

Born from this profound personal experience, KNOWHEN® has emerged as the pioneer in saliva-based ovulation testing in the United States. As the first FDA-cleared over-the-counter fertility monitor of its kind, we’re proud to offer women a natural, reusable, and remarkably accurate way to understand their fertility cycles.

Every breakthrough begins with a story. For KNOWHEN®, it started with our founder Helen Denise’s personal journey through an ectopic pregnancy in the early 2000s. This life-altering experience transformed her mission in life—from a successful career woman to a passionate advocate for women’s fertility awareness and health education.

Our Innovation in

Fertility Awareness

KNOWHEN® Advanced Ovulation Test stands apart through its revolutionary approach to fertility monitoring:

The KNOWHEN® Difference

At Hilin Life Products, we believe that understanding your body shouldn’t be complicated or costly. Our mini-microscope technology detects subtle changes in saliva patterns during ovulation, providing clear, accurate results every morning. This simple yet sophisticated approach has transformed family planning for women worldwide.

Our Commitment

to Women's Health

For over a decade, we’ve dedicated ourselves to:

Looking to the Future

Under Helen’s continued leadership, we’re constantly advancing our technology while staying true to our core mission. As we develop new fertility awareness solutions, we remain committed to blending scientific precision with natural approaches to women’s health.

KNOWHEN® isn’t just a product—it’s a movement toward a better understanding of women’s bodies, backed by science and inspired by personal experience. Whether you’re planning to conceive, seeking natural family planning options, or simply wanting to understand your body better, KNOWHEN® provides the accuracy and support you need for your journey.

Join the thousands of women who have discovered the natural way to monitor their The most <strong style=”color: #9654a7″>natural way</strong> to watch <BR>your fertilityfertility with KNOWHEN®—FDA-cleared, clinically proven, and personally empowering.


Ovulation can be detected by various signs not readily discernible by anyone other than the woman experiencing them. Women nearing ovulation experience changes in their cervix and the mucus it produces along with their basal body temperature.


Watch the Video

Latest Blog

Introduction to Women's Body, Ovulation, Fertility, and Reproductive Health

Understanding your body is one of the most empowering steps you can take towards maintaining your health and well-being.

Understanding Your Ovulation Cycle as a Woman

Ovulation is a part of the menstrual cycle where an egg is released from one of the ovaries. Read on to learn how to track your symptoms and know when it occurs.

Men's Fertility and Infertility

Starting a family is an exciting milestone that many couples dream about. Yet, the journey to parenthood isn’t always straightforward, especially when fertility challenges arise.

Our Happy Mothers

Kim Tillinghast

Principal, Partner

Kim Tillinghast began her career in the banking industry in 1985. She graduated with a degree in Finance from West Texas State University in 1990 and has continued her education by earning her Series 24 General Securities Principal Exam and Certified Plan Fiduciary Advisor (CPFA™). Shortly thereafter she started her brokerage career at a traditional wirehouse in downtown Los Angeles, California in 1991. After relocating to Orange County, Kim became an independent financial advisor in May of 1993. She brings over 37 years in the banking and finance industry with experience ranging from designing, developing, employing and maintaining complex investment strategies, Pension Plans, Employee Stock Option Plans, Corporate Finance, Estate Planning and Transition. Outside of her career, she served as Co-Chair of the Dallas County Susan G. Komen Race for the Cure 2013 and 2014 and currently serves on the Board of the Tillinghast Society, Inc. With a deep love for animals, she continues to volunteer for multiple emergency animal response teams including Red Rover, HSUS, UAN, ASPCA and volunteers weekly at the Irving Animal Shelter. Kim also loves worldwide adventure travel and has many amazing experiences visiting almost half of the world’s countries and all seven continents, twice.

Karthik Muraliraj

CFP®, ChFC®, CLU®, RMA®, Partner

Karthik Muraliraj was raised in Fort Worth, Texas, and developed an interest in investing and economics at a young age. After graduating from the University of Texas at Austin with a Bachelor of Arts in Economics and a minor in Business, he started his career as a financial professional in 2008. Throughout his career, Karthik has continued to educate himself by gaining multiple designations. Since moving to Dallas, he has been an active member in the community—volunteering with organizations such as the network of Indian Professionals, Dallas Autumn Ball and Reading Partners. Karthik is an avid sports fan and enjoys supporting his alma mater as a proud member of the Texas Exes Dallas Chapter. In his free time, Karthik enjoys cooking, travel, fitness and spending time with this wife, son, dog, and cat.

Crystal Arredondo

MBA, CDFA®, CPFA™, Partner

Crystal Arredondo was born and raised in Germany. She moved to Texas following her parents’ decision to retire after serving an overseas career in the Armed Forces. Seeing firsthand the difficult transition to civilian life after retirement, Crystal obtained her MBA in Finance at the University of North Texas and began her career as a financial advisor. In 2009, she completed the Retirement Planning Specialist Program at the Wharton School of Business, University of Pennsylvania. In 2018, she earned her designation of Certified Divorce Financial Analyst® (CDFA®). In 2022, she earned the additional designation as a Certified Plan Fiduciary Advisor (CPFA™). As the daughter of an immigrant mother, she especially enjoys helping women and business owners make decisions that affect their financial independence. She served as the 2015-16 Chair for the National Association of Women Business Owners (NAWBO) and 2016-17 Chair for the NAWBO Institute of Entrepreneurial Development.

Philip Strunk

CFP®, CPA, Partner

Philip Strunk is a native of Houston, TX. Philip earned his Bachelor of Business Administration and Masters in Professional Accounting from the University of Texas at Austin’s McCombs School of Business. He earned his designation as Certified Public Accountant (CPA) in 2004 and CERTIFIED FINANCIAL PLANNER (TM) certification in 2010. Having started his career with Deloitte & Touche, LLP in 2005, Philip spent a year and a half in Deloitte’s Audit and Assurance Services group and provided a variety of financial services for a number of Fortune 500 companies. He decided in late 2006 that his talent and passion for investments were best suited for working with smaller groups and individuals. After obtaining the required securities registrations and insurance licenses, Philip became a financial advisor. The impact was plainly visible and more fulfilling. Philip serves as the Investment Director for MPACT.

John C. Farris

CAP®, CFS®, Partner

John C. Farris is a founding partner and has more than forty years in both public and private business serving in a variety of management and leadership capacities. John completed the Retirement Planning Specialist Program at the Wharton School of Business at the University of Pennsylvania earning the Retirement Planning Specialist designation. John and his family have a history of philanthropic giving through numerous non-profit organizations. John recently completed his designation as a Chartered Advisor in Philanthropy® (CAP®). He is also a member of The International Association of Advisors in Philanthropy. His primary goal is to help people give intelligently with love and thereby experience the true joy of helping others. John lives in Park Cities and has served on the Public Works Advisory Council, as finance director of the BSA West Park District, the BSA Troop 82 Executive Board, and as a BSA Assistant Scoutmaster for Troop 82, Dallas, Texas.