cycle health

Perimenopause vs PMS Symptoms: Key Differences

Mood swings, disrupted sleep, and irregular periods can signal either PMS or the start of perimenopause — and the distinction matters. Here's how to read your hormonal signals by pattern, not just symptom.

How Poor Sleep Disrupts Your Menstrual Cycle and Hormones

Struggling with irregular periods or worsening PMS? Your sleep habits may be a key factor. Here's exactly how melatonin, cortisol, and LH disruption link poor sleep to menstrual cycle changes — backed by research.

PMS vs PMDD: How to Tell the Difference

PMS and PMDD share timing but differ sharply in severity and clinical definition. This explainer breaks down DSM-5 criteria, the luteal-phase serotonin connection, and a two-cycle tracking method to help you know when to seek care.

Menstrual Cycle Phases and Hormones Explained

Your cycle is driven by four distinct hormonal phases — each shifting estrogen, progesterone, LH, and FSH in ways that directly shape your energy, mood, and focus. Here's the science behind what you feel and why.