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Cycle phases

Every article on the Simply Track blog tagged cycle phases, written in plain English.

27 July 20267 min read

Your Cycle Has Four Phases

Most people picture the cycle as bleeding, and not bleeding. It actually runs through four phases, and the second half keeps far steadier time than the first.

Cycle-dial graphic labelled "Vital signs" with the heading "Pulse, pressure, and your cycle" and a dial reading "Set out in 2006", the ring split into period, fertile and luteal segments.

Cycle Science

27 July 20267 min read

Your Cycle Is a Vital Sign

Clinical guidance has treated the menstrual cycle as a fifth vital sign since 2006, reaffirmed as recently as 2025, with a reference range and a list of patterns worth a GP visit.

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