Ava, San Francisco, has shared results from a recent clinical study indicating that the sensor technology incorporated in the company’s cycle-tracking Ava bracelet has potential for future use in pregnancy detection.

In a recent clinical trial conducted in collaboration with the University Hospital of Zurich, the Ava bracelet captured physiological changes known to occur in early pregnancy.1 More specifically, significant differences in heart rate variability, pulse rate, and temperature were found to be present in conceptive and non-conceptive cycles of the late luteal phase. Based on these findings, the researchers concluded that the Ava bracelet could provide future users with an indicator of pregnancy, based on changes in the physiological parameters reported in the late luteal phase.

“Our findings could pave the way for the continuous assessment of the occurrence of pregnancy without any effort from the user, and consequently add an innovative option for early pregnancy detection,” says Peter Stein, cofounder and vice president of research and development at Ava.

Launched to the public in July 2016, Ava’s cycle-tracking bracelet aids women in optimizing their chances of conception by more precisely determining their window of fertility.

Lea von Bidder, Ava.

Lea von Bidder, Ava.

“We’re excited about this research because it fits in with our long-term vision, which has always been for Ava to become a lasting companion for women, giving them data-driven and scientifically proven insights along all stages of their reproductive lives,” says Lea von Bidder, cofounder of Ava. “This is another step in that direction.”

For more information, visit Ava.


  1. Shilaih M, Falco L, Kuebler F. Wrist-worn wearable sensors capture the physiological changes associated with early pregnancy. Fertil Steril. 2017;108(3):e379; doi: 1016/j.fertnstert.2017.07.1103.