Evidence-based articles about your cycle, body, nutrition, and wellbeing. Written for real women and their partners.
Track Your Cycle Free89 days Pro free in Telegram
More than 10 000 women are tracking their cycle in Luna right now
It's a red flag for endometriosis. See a gynecologist if painkillers don't help.
Consistency from month to month matters more than the exact length.
Chronic stress and low calories can cause hypothalamic amenorrhea.
Luna's algorithm needs at least one full cycle of data.
Glycinate form is best-tolerated. Discuss with your doctor.
The menstrual cycle is a 21-35 day hormonal arc, not just a few bleeding days. Estrogen, progesterone, LH and FSH shift weekly, and they don't only control fertility. They also drive your energy, mood, sleep, skin, appetite and even how your body responds to exercise. Understanding the pattern is one of the highest-leverage things you can do for your health.
Luna treats your cycle as a daily companion, not a calendar entry. We give you predictions that adapt to your real data, phase-specific tips, and a private place to log mood and symptoms. The articles below cover the foundations: the 5 phases, hormones, fertility, PMS, irregular periods, and how to support a partner who's tracking too.
Everything is evidence-based. We cite ACOG, RCOG, NICE and NHS where it matters. The content was reviewed by board-certified OB-GYN consultants in May 2026.
Luna is a free, private cycle tracker inside Telegram. No app store needed.
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