#1 Advanced Ovulation Test Kit

Identifies 5 Most Fertile Days

Plan your pregnancy
on the first try

Find out how it works

Be aware and
in your body

Find out how it works

Get the most
accurate information
about your cycle

Find out how it works

Avoid pregnancy
& enjoy your sex life

Find out how it works


  • Saliva Ovulation Test Kit
  • How it Works
  • Fertility Monitor App
  • KNOWHEN® Mission

Trying to Conceive?

  • 6 Reasons to Try KNOWHEN®
  • Get Pregnant
  • Ovulation Cycle
  • Men’s Infertility

Avoiding Pregnancy?

  • 4 Reasons to Try KNOWHEN®
  • Natural Family Planning
  • Track Your Cycles
  • Sex for Health


  • FAQ
  • Testimonials
  • Warranty

KNOWHEN® Advanced Ovulation Test Kit

Fast, Easy, Safe

Results in minutes, easy-to-use with no messy urine strips. It is the only clinically tested saliva ovulation test in the USA and is FDA Cleared, CE marked and Quality Guaranteed.


The KNOWHEN® Ovulation Test tracks your ovulation using only one drop of your saliva. It identifies your five most fertile days and the best days in your ovulation cycle if you are trying to conceive.

Big Savings

One KNOWHEN® Saliva Ovulation Test is REUSABLE DAILY for years. There are no refills to buy and you will save approximately $350 annually.


KNOWHEN® is 98.9% accurate (100% proven correlation with a doctor’s ovarian ultrasound examination). It is also 100% Safe, Natural and OB/GYN recommended. It has been rated the best ovulation predictor kit for years.

How to Use KNOWHEN® Check out these videos to learn more about the KNOWHEN® Advanced Ovulation Test Kit


Exclusive Offer

Buy the KNOWHEN® Advanced Ovulation Test Kit Today and Get a $10 Visa Gift Card

Order Your Test Kit!

KNOWHEN® is Designed by
Women for Women

Trying to Conceive?

Helps women that are struggling to become pregnant by identifying their five most fertile days of each month. These are also the best days to have sexual intercourse with your partner, which will increase your chances of getting pregnant. Continuing to monitor your ovulation cycles after childbirth is important because you can detect accidental ovulation while breast-feeding.

Adolescent Health Education

Educates adolescents entering their reproductive years with an easy-to-use microscope to help them track their reproductive cycles and detect irregularities early, therefore allowing medical conditions to be revealed and managed.

A Natural Way to Control Your Sex Life

KNOWHEN® can detect accidental ovulation when used in conjunction with hormonal contraception, enabling women to prevent unplanned pregnancies. Offers a significant alternative when hormonal or barrier methods of contraception are inadvisable because of risk factors, allergies or religious beliefs.

For Menopause

Is excellent for women entering their menopausal years to monitor their often-irregular ovulation pattern and to confirm the cessation of ovulation.

Take Control of Your Health

The best solution for a woman to control her reproductive health is more information. If a woman cannot conceive due to a medical issue then it is important to understand this early on so that your doctor can discuss possible treatments before it’s too late.

No Side Effects

The KNOWHEN® Advanced Ovulation Test has no side effects, assists women struggling with irregular menstrual cycles to detect with accuracy if and when they are ovulating and provides a low cost alternative to women who cannot afford costly infertility treatments.

Customer Testimonials

Carrie January 22, 2019

The KNOWHEN saliva test has been a fantastic addition in our quest for pregnancy. It is so empowering to have a visual component to see your own hormone changes and predict fertility. It is so much cleaner to use and less wasteful than the plastic monitors and plastic urine sticks. Having a well made reusable product... Read more

Carol January 13, 2019

Fabulous pregnancy tool! Very accurate, worth money spent! I am now pregnant, personally, for me it worked like a charm. It is pretty accurate and thanks to the Knowhen saliva test I am now pregnant. I used it every day when I woke up before I had any food or... Read more

Vlada January 16, 2019

It is really amazing to watch the change in my saliva and predict my ovulation. I really enjoy the Knowhen monitor, because not only is it the easiest to use ovulation test on the market, but also I have been learning a lot about my own body after listening to the CD and following the Knowhen website blogs. The free mobil app is so cool and convenient to use as well. Love it. Read more

MariaJuly 29, 2018

Excellent product! I am using it along with the Billings ovulation method and it is just a perfect combination for me since the Billings method tells me my fertile days and this one not only knows when I am fertile but also when I am ovulating! Read more

DustinApril 29, 2018

This product is absolutely the best! It has accurately predicted without fail when my girlfriend is ovulating. Now we know when she can and when she CAN'T get pregnant. What we both love about KNOWHEN is that the results are so fast! Brilliant product! Read more

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