• Buy

    Buy KNOWHEN® at CVS

    Join the movement of 21st Century Health, visit CVS store and get your KNOWHEN® today!

  • Introducing
    your friend, Eva

    Eva lets you KNOWHEN®

    The KNOWHEN® Saliva Fertility Kit and APP have been uniquely designed to allow women to easily and accurately find out when they are ovulating.

  • Family

    Keep it simple and natural

    KNOWHEN® is revolutionizing the world of women’s health by giving women the power to understand and control their fertility cycles. KNOWHEN® can help you to get pregnant faster or to avoid unplanned pregnancy.

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  • Dear

    A Word from Helen, CEO & Founder

    "My promise to you is that KNOWHEN® will change your life and unlock the secret of your unique fertility cycle... "

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  • Every woman
    should know

    When is the best time to have sex

    The KNOWHEN® Saliva Fertility Monitor is the only US Clinically tested, FDA cleared product to let you know when to conceive.

    Watch Eva

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The Natural Solution to Family Planning

Would you like to know whether you can conceive and when would be the best time to do that? Thanks to the development of a simple, easy-to-use device, now you can. Let KNOWHEN® help you predict your fertility cycles accurately, efficiently, and naturally.

Who Benefits from Using KNOWHEN®?

You benefit from using the KNOWHEN® if you:

  • are trying to conceive and want to increase your chances of conceiving
  • want to take control of your personal fertility
  • are looking for a simple and accurate method to predict pregnancy and monitor your ovulation cycle
  • prefer a natural way to monitor the regular menstrual cycle
  • are a couple who want to enjoy their sex life naturally without fear of conception
  • have irregular menstrual cycle
  • are premenopausal women who don't want a surprise pregnancy
  • prefer "Freedom of Choice and Peace of Mind" when it comes to family planning

Learn More

Meet Our Doctor

  • Meet Dr. Hugh Melnick

    Dr. Hugh Melnick, MD , is a leader in the field of infertility treatment helping thousands of couples conceive in a supportive environment combining the best of medical science with empathy and compassion. Dr. Melnick served as Director of the Endocrinology Clinic at Lenox Hill Hospital in New York City ...

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