How Period Tracking Birthed the Calendar

Women as the first mathematicians, the first agriculturists.

Period tracking apps caught sharing medical data with Facebook

How Period Tracking Birthed the Calendar

A Phenomenal Physiologist - by Olivia Campbell

Fertility apps like Natural Cycles claim to be birth control. Don't trust them.

Period Calculator Flo Health, 44% OFF

A Catalyst for Change - by Olivia Campbell - Beyond Curie

This Period-Tracking Method Will Protect Your Privacy Better Than an App - CNET

Ovulation & Period Tracker - Apps on Google Play

Period Calculator Flo Health, 44% OFF

Beyond Curie, Olivia Campbell

Paperback Publication Day! - by Olivia Campbell