Understanding the Menstrual Cycle
A simple guide for both women and men to understand monthly cycle changes and how they affect fertility.
Last updated 2026-06-19 ยท Pending medical review

Cycle phases
The menstrual cycle has four main phases: period, follicular, ovulation, and luteal. Each affects hormones, mood, and fertility differently.
A typical cycle is 21โ35 days, with day 1 being the first day of bleeding.
Ready to start your journey?
Create your free ParentVibes dashboard to track fertility, IVF, pregnancy, baby milestones, vaccines, and parenting reminders.
Continue exploring
Simple guidance for couples starting their TTC journey.
Understand fertile windows, cycle signs, and timing.
Know when to consult a doctor or fertility specialist.

Questions every couple should ask before planning a baby.

Health, lifestyle, finances, and emotional readiness.

Track ovulation signs and fertile days.
