Coming Soon

A Personal Fertility Sensor Coming Soon

For women trying to conceive, Priya is being developed as an intravaginal ring to help your patients effortlessly track their fertility.   Priya has been designed to wirelessly capture continuous core body temperature to detect subtle temperature patterns that occur PRIOR to ovulation.  Currently undergoing testing in clinical trials, the ring transmits temperature data directly to the Priya App on the patient's smartphone in real-time. 


Patients often seek your advice on conception. With Priya, you will be able to confidently offer them a scientific solution that helps pinpoint that fertile window. Priya will liberate your patients from the hassle of today's commonly used fertile detection methods. 


What is Priya:

Priya - For the next generation of patients seeking precise personal monitoring

Priya is an intravaginal ring with the same dimensions and flexibility as Estring®. We use the same medical-grade silicone form-factor and have inserted a wireless continuous temperature sensor. Priya is intended to be an over-the-counter product that a woman can insert while in the comfort of her home.

Temperature is continuously monitored and all the data is automatically transferred to the Priya app on her smart phone. An algorithm in the app is being tested to detect these changes in circadian rhythm prior to ovulation.



There are no monitors, attachable extra sensors, urine strips, or replacement parts. Users simply pair the Priya Ring with the Priya App on their personal smartphone and then insert the ring.  Your patients can then go about their normal daily activities and Priya will send an alert to her phone when she is likely most fertile.  The Priya Ring is being designed for vaginal use only. 


Internal, continuous, core temperature monitoring is a more precise, reliable and accurate method to identify ovulation compared with once-daily oral thermometers or skin measurements (1,2,3). Priya's advanced technology is designed to detect the pre-ovulatory decline in core body temperature. 



No charts, no confusion and no guessing. Your patients will be empowered with the confidence of knowing what is happening in her body in real-time. 


join the priya early utilization team

Seeking physicians to participate in the Priya pre-launch registry.


The Science Behind Priya


It is well known that a pre-ovulatory decline in core temperature takes place 24-48 hours prior to ovulation (2,3). When measured accurately, this decline provides an important tool for predicting ovulation (see figure below). Having intercourse during these pre-ovulatory days significantly increases the probability of conception (6).

Women’s bodies tightly control body temperature and exhibit a striking diurnal temperature pattern. This temperature pattern has been well studied and has been established as a highly reliable marker for circadian rhythm (8). Continuous core temperature monitoring can be used to precisely predict impending ovulation by identifying a dip in body temperature (circamensal nadir) as detected with multiple continuous temperature readings in the 48 hour period prior to ovulation. 

In the published study conducted by Mary Coyne et al, "Circadian rhythm changes in core temperature over the menstrual cycle: method for noninvasive monitoring", core temperatures were measured every minute over the course of an entire menstrual cycle. The results of this study showed a beautiful circadian rhythm could more-reliably identify the temperature changes that precede ovulation. Even more impressive was that circadian rhythm could better-detect the important DIP in temperature that precedes the surge of luteinizing hormone by one or two days (2).

Therefore, oscillating temperature patterns can be measured accurately and precisely using a vaginal rings that are similar to those that women have been wearing for several years.  



  1. Engels H, Yarandi H, and Davis J. Validation of the ingestible Vital Sense temperature capsule. Journal of Exercise Physiology. 2009; 12: 1

  2. Coyne et al. Circadian rhythm changes in core temperature over the menstrual cycle: method for noninvasive monitoring. Am J Physiol Regulatory Integrative Com Physiol 2000, 279:1316-132

  3. Cagnacci, A., Volpe, A., Paoletti, A.M., and Melis, G.B. Regulation of the 24-h rhythm of body temperature in menstrual cycles with spontaneous and gonadotropin-induced ovulation. Fertil Steril. 1997; 68: 421–425

  4. Johnson SR, Shaw R. Success of detection of LH surge by home ovulation tests. Fertil Steril. 2009; 2(3):S101.

  5. Pray S and Pray G. Detecting Pregnancy and Ovulation with Home Test Kits. U.S. Pharmacist. Sep 2012

  6. Wilcox A, Weinberg C, and Baird D. Timing of sexual intercourse in relation to ovulation. 1995 NEJM 333(23):1517-1521

  7. Consumer Reports. Home Test Kits 5 Questions to Ask Before you Buy. June 8, 2009.

  8. Brown et al. A statistical model of the human core-temperature circadian rhythm. Am J Physiol Endocrinol Metab. 2000; 279: E669–E683.


Who is Behind Priya?


Alene Campbell, CEO. Alene has led several successful biotech and health care firms during her career, introducing groundbreaking and lifesaving technologies to market.  She has held leadership marketing, finance, sales and business development positions including VP of Corporate Development at Myogen (now Gilead), General Manager of RPI/SiRNA (now Merck), VP of Marketing and Sales, CFO and Executive VP of ChemTrak, (a consumer products company). Ms. Campbell holds an MBA from the University of California, Berkeley.

Don Kirkpatrick, Chairman of the Board, Prima-Temp Inc. Don is the founder and Chairman of Cadre Technologies, the largest software provider to the third-party logistics in warehouse management and distribution technology. Don is an engineering graduate of Princeton University and Director of Denver School of Science and Technology.

Rich Pollack, CTO and Co-Founder. Rich’s engineering team developed the temperature/pressure sensor in tires for Goodyear that later evolved into Phase IV Engineering in Boulder, CO. His engineering career spans 25 years experience including wireless temperature sensors for a variety of applications and is named in over 15 patents. He founded Phase IV and three other companies.

Wade W. Webster, MD, CMO and Co-Founder. Dr. Webster is a practicing Emergency Physician at Evergreen Hospital Medical Center, Kirkland, Washington for 21 years. He received his Medical Degree from Albany Medical College in Albany, New York. Wade is currently the Chief Science Officer for DVM Systems, LLC, a system for early disease detection and reproduction that uses temperature monitoring in dairy cattle and ruminants.