kegg

kegg is a fertility tracker made by Lady Technologies, Inc., based in San Francisco. It is built around cervical mucus, the fluid that changes through the cycle and makes conception possible only on a few days each month: a medical-grade silicone sensor reads changes in the vaginal environment in about one minute a day.

The companion app turns those readings into a Fertility and Cervical Mucus Score and an ovulation probability, and also offers guided kegel routines for pelvic floor health. The idea dates to 2016, when founder and CEO Kristina Cahojova was asked to track her cervical mucus and found the methods outdated; kegg now reports more than 100,000 couples using it, including women with PCOS and irregular cycles, and the company says the device is clinically validated.