Learn about your cycle
Plain-language guides, based on clinical guidelines and research, with sources on every page.
How long is a normal menstrual cycle?
A normal cycle is 24 to 38 days, and only about 13% of cycles are exactly 28 days. Here's what's typical, what varies, and when to check in with a doctor.
4 minute read
How to tell when you're ovulating
Three ways to find ovulation: calendar estimates, LH ovulation tests and basal body temperature. How each works, and how to combine them.
5 minute read
When to see a doctor about your period
Heavy bleeding, cycle length, bleeding between periods and missed periods: signs worth raising with a clinician, based on clinical guidelines.
4 minute read
Is your period tracker private?
Period apps hold sensitive health data. Six questions to ask about selling, sharing, ad trackers, exports and deletion, and how LunWise answers them.
4 minute read