The menstrual cycle runs from the first day of one period to the day before the next. These guides explain the four phases, how hormones change through the month and what a normal cycle length looks like. Start with the four phases of the menstrual cycle, then estimate your own dates with our menstrual cycle calculator.
Menstrual Cycle Luteal Phase Length Normal Range, Symptoms & Fertility Impact The luteal phase is more variable than the “always 14 days” rule most guides repeat. Real research puts the range at 7 to 19 days, even in 28-day cycles. Here is what shapes your luteal phase length, symptoms and fertility odds. 12–14 days typical average…
Menstrual Cycle How Stress Affects Your Period Delayed, Missed and Irregular Cycles Explained How stress affects your period is one of the most common questions people ask when cycles become late, irregular, or stop temporarily. This guide explains exactly how stress and your menstrual cycle are connected through cortisol and the HPA axis, how long…
Period Health PMS vs PMDD Key Differences, Symptoms and Treatment Explained Many people notice mood swings or irritability in the days before their period, that’s usually PMS. For some, the emotional symptoms become intense enough to disrupt work, relationships, and daily life. This is PMDD, a distinct, clinically recognized condition. Here’s how to tell them…
Home › Menstrual Cycle › Why Is My Period Early? Explore Home Period Calculator Ovulation Calculator Pregnancy Due Date Calculator Safe Days Calculator Learn Menstrual Cycle Ovulation Fertility & Fertile Window Safe Days Pregnancy Period Health Calculator Guides Menstrual Cycle Why Is My Period Early? Causes and When to Worry Why is my period early?…
Home › Menstrual Cycle › Normal Menstrual Cycle Explore Home Period Calculator Ovulation Calculator Pregnancy Due Date Calculator Safe Days Calculator Learn Menstrual Cycle Ovulation Fertility & Fertile Window Safe Days Pregnancy Period Health Calculator Guides Menstrual Cycle Basics Normal Menstrual Cycle: What a Period Is, Length and Phases A normal menstrual cycle lasts 21…
Home › Menstrual Cycle › What Causes Menstrual Bleeding? Menstrual Cycle Basics What Causes Menstrual Bleeding? What causes menstrual bleeding is a fall in estrogen and progesterone. When no pregnancy happens, the uterine lining is no longer needed, so it breaks down and is shed as your period. This guide covers the hormone steps, what…
Home › Female Reproductive System Explore Home Period Calculator Ovulation Calculator Pregnancy Due Date Calculator Safe Days Calculator Learn Menstrual Cycle Ovulation Fertility & Fertile Window Safe Days Pregnancy Period Health Calculator Guides Menstrual Cycle Basics Female Reproductive System: Organs, Anatomy and Functions The female reproductive system is the network of organs that produces eggs,…
Home › Menstrual Cycle › Menstrual Cycle Irregularities Menstrual Cycle Health Common Causes of Menstrual Cycle Irregularities Menstrual cycle irregularities are a common concern for women of all ages. Occasional variation can be normal, but persistent or severe changes may point to an underlying medical condition. This guide explains the common causes of irregular periods,…
Home › Menstrual Cycle › Menstrual Cycle Phases Menstrual Cycle Menstrual Cycle Phases – What Happens During Each Stage? Menstrual cycle phases are the four stages your body moves through each month: menstrual, follicular, ovulation, and luteal. Each stage is driven by a different balance of hormones. This guide explains what happens in each one,…
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